Principles of Public Expenditure: Ensuring Economic Efficiency and Equity

Every rupee the government spends carries weight. It builds roads, funds schools, pays soldiers, subsidises fertiliser, and keeps hospitals running. But how should a government decide how much to spend, where to spend it, and when to pull back? This is where the principles of public expenditure come in. These are time-tested rules, crafted by economists like Hugh Dalton, A.C. Pigou, and Findlay Shirras, that guide governments in spending public money wisely, so that social welfare goes up, waste goes down, and the economy stays on a steady path.

What is public expenditure and why do principles matter? 🔗

Public expenditure is the money spent by central, state, and local governments on activities like defence, education, healthcare, infrastructure, subsidies, and social welfare. Its core purpose is to promote and maximise social welfare rather than run programmes for their own sake.

For most of the 19th century, governments believed in laissez faire and kept expenditure small. Today, the picture is very different. Governments are expected to drive growth, redistribute income, stabilise prices, and provide basic services. With responsibilities this wide, a set of guiding rules becomes essential. Without them, expenditure can easily slip into waste, corruption, or inflationary pressure.

These rules are called the canons or principles of public expenditure. The early canons were laid down by Prof. Findlay Shirras, and later economists expanded them to suit a modern welfare state.

The foundation: principle of maximum social advantage 🔗

The most fundamental principle of public expenditure is the principle of maximum social advantage. It was popularised by the British economist Hugh Dalton, while Prof. A.C. Pigou called a similar idea the “principle of maximum aggregate welfare.” According to Dalton, the best system of public finance is one that secures the maximum social advantage from the operations it conducts.

In simple terms, the government should spend up to the point where the Marginal Social Benefit (MSB) from the last rupee spent equals the Marginal Social Sacrifice (MSS) imposed by the last rupee of tax collected. Push spending (and taxation) beyond that point, and the sacrifice outweighs the benefit. Stop short, and society misses out on welfare it could have had.

Why this principle is so central 🔗

Public expenditure tends to show diminishing marginal social benefits, while taxation shows increasing marginal social sacrifice. The first vaccine for a child saves a life; the hundredth dose in a storeroom adds very little. The first tranche of income tax is bearable; additional layers start to hurt savings, investment, and work effort. The optimum is where these two curves meet.

This principle directly shapes modern fiscal thinking in India. When the Finance Ministry decides whether to increase spending on PM-KISAN, expand the PLI scheme, or cut subsidies, it is, in effect, asking Dalton’s question: does the extra social benefit justify the extra social cost?

The classical canons of public expenditure 🔗

Building on Dalton and Pigou, economists like Findlay Shirras formalised a set of specific canons. These are the operational rules that translate the broad idea of social advantage into day-to-day budgetary practice.

Canon of benefit (maximum social benefit) 🔗

This is the practical twin of the maximum social advantage principle. Shirras argued that state spending should confer benefits on the community at large rather than on an individual group or section. Money must flow toward projects that improve production, protect the country, reduce inequality, and support the poor. A subsidy captured by a politically connected lobby fails this test; a rural electrification programme that reaches lakhs of households passes it.

Canon of economy 🔗

Economy here does not mean stinginess. It means avoiding waste, duplication, and extravagance. As per this canon, limited revenue resources should be used in a productive manner, and duplication of expenditure and overlapping of authorities should be avoided. The canon also insists that public expenditure should not hurt private savings or the productive capacity of the economy. To meet this canon, governments increasingly rely on project appraisal and cost-benefit analysis before sanctioning large outlays.

Canon of sanction 🔗

No rupee of public money should be spent without the prior approval of a competent authority. In a parliamentary democracy, this is why every Union Budget is debated, voted on, and passed before expenditure begins. The canon has two dimensions: pre-sanction (approval before spending) and post-audit (scrutiny by auditors after spending). The Comptroller and Auditor General of India (CAG) performs this post-audit role, checking whether money was used for the purpose it was sanctioned for.

Canon of surplus 🔗

Classical economists believed that governments, like prudent households, should aim for a surplus budget. Revenue should exceed expenditure, and the government should avoid chronic deficit financing. In today’s world, however, this canon is considered somewhat outdated. Keynesian economics and the experience of depressions and pandemics have shown that deficits are sometimes necessary to revive demand. Still, the spirit of the canon survives in modern fiscal rules. India’s Fiscal Responsibility and Budget Management (FRBM) Act, 2003 places statutory limits on fiscal and revenue deficits to prevent reckless borrowing.

Canon of elasticity 🔗

Public expenditure must be flexible. The government should be able to expand spending during emergencies like wars, pandemics, and natural disasters, and contract it during normal times. Public expenditure should increase during periods of emergency and taper down when conditions improve. India’s sharp rise in expenditure during the COVID-19 pandemic, and the use of the FRBM escape clause to breach deficit limits, is a textbook example of this canon in action.

Canon of productivity 🔗

A major share of public expenditure should go toward productive activities that build capacity and drive growth. Public expenditure should encourage production efficiency of the economy. This is the logic behind emphasising capital expenditure (roads, ports, railways, digital infrastructure) over purely consumptive spending. Capital spending creates long-term assets, raises productivity, and generates employment, while excessive current expenditure can crowd out investment.

Canon of equitable distribution 🔗

Expenditure policy must reduce, not widen, inequalities of income and wealth. Programmes should be tilted toward the poor and vulnerable. Spending on educational facilities, medical benefits, cheap housing, old age pension and other social security measures gives effect to this canon. Schemes like MGNREGA, the Public Distribution System, Ayushman Bharat, and pensions for the elderly are examples of how this canon shapes Indian fiscal policy.

Canon of neutrality 🔗

Public expenditure should not distort the normal working of the economy. It should not discourage production, work, saving, or investment. Any spending that creates perverse incentives, such as a subsidy that leads to overuse of a scarce resource, violates this canon. The broader idea is that government intervention should offset, not amplify, adverse economic effects.

Modern principles and fiscal responsibility 🔗

The classical canons still form the backbone of public finance, but modern practice has added more nuanced principles.

Public interest, efficiency, and adequacy 🔗

Modern texts list public interest, economy, efficiency, equity, adequacy, and flexibility as core guiding principles. Adequacy means spending enough to actually meet the needs, essential services cannot be starved in the name of economy. Efficiency pushes governments to get the maximum outcome per rupee, typically through outcome budgeting and performance reviews.

Fiscal discipline through law 🔗

Principles are useful, but they need institutional teeth. In India, the FRBM Act, 2003 institutionalised financial discipline, aimed to reduce the fiscal deficit, improve macroeconomic management, and strengthen fiscal prudence. The Act originally targeted elimination of the revenue deficit and capping the fiscal deficit at 3% of GDP. Though deadlines have been revised, especially after the 2008 financial crisis and the COVID-19 pandemic, the Act continues to anchor the canons of economy, surplus, and sanction in hard law.

The N.K. Singh Committee, set up in 2016 to review the FRBM Act, recommended using debt-to-GDP ratio as the primary anchor of fiscal policy, with a target of 60% for the general government (40% for the Centre, 20% for states). This represents a modern refinement of the canon of surplus, one that is less rigid but still committed to fiscal prudence.

Transparency and accountability 🔗

A principle that has gained weight in the last three decades is transparency. Budgets, audit reports, and expenditure data are increasingly published in the public domain. The Union Budget documents, including the Medium-Term Fiscal Policy Statement and Fiscal Policy Strategy Statement, are part of this drive. Transparency makes the canons of sanction, economy, and benefit enforceable because citizens and Parliament can see where the money went.

Why these principles matter for India today 🔗

India is a developing economy with vast social needs and limited fiscal space. The country must balance ambitious growth targets with equity concerns and debt sustainability. The canons of public expenditure offer a useful compass:

When the government expands capital expenditure on highways, it is applying the canon of productivity. When it ring-fences subsidies for the poorest households under schemes like Ujjwala or PMAY, it honours the canon of equitable distribution. When the CAG flags irregularities in a welfare scheme, it is the canon of sanction at work. And when the Finance Minister resists populist demands for untargeted freebies, the canon of maximum social advantage is being invoked, even if the Minister does not name it.

In an era where public expectations from the state keep rising, from climate action to digital public infrastructure, these principles act as a check against runaway spending and a guide toward spending that actually improves lives.

Bringing it together 🔗

The principles of public expenditure are not abstract academic rules. They are practical filters that help governments decide what to spend on, how much to spend, and how to justify that spending to citizens. From Dalton’s principle of maximum social advantage to Shirras’s classical canons and the modern FRBM framework, the underlying message is consistent: public money must create the greatest possible welfare at the lowest possible cost to society, while keeping future generations in mind.

A government that respects these principles spends with purpose. A government that ignores them risks fiscal crisis, inequality, and loss of public trust.

What do you think? Given India’s competing demands, rapid growth, welfare expansion, defence needs, and climate commitments, which of these canons do you think policymakers struggle with the most? And if you had to choose between the canon of equitable distribution and the canon of surplus during an economic downturn, which would you prioritise and why?

References

1. https://www.geeksforgeeks.org/canons-of-public-expenditure/
2. https://edurev.in/t/111238/Principle-of-Maximum-Social-Advantage-Public-Finan
3. https://www.yourarticlelibrary.com/trade-2/canons-of-public-expenditure-laid-down-by-prof-findlay/26302
4. https://www.accountingnotes.net/financial-management/public-expenditure/8-main-canons-of-public-expenditure/10017
5. https://cag.gov.in/en
6. https://www.indiabudget.gov.in/doc/frbm1.pdf
7. https://mathabhangacollege.ac.in/wp-content/uploads/2024/02/CANONS-OF-PUBLIC-EXPENDITURE_compressed.pdf
8. https://en.wikipedia.org/wiki/Public_expenditure
9. https://dnpgcollege.ac.in/wp-content/uploads/2023/06/Unit-6-English.pdf
10. https://en.wikipedia.org/wiki/Fiscal_Responsibility_and_Budget_Management_Act,_2003
11. https://www.indiabudget.gov.in/