Notes on the Design of the Tax System

The Design of the Tax System

Introduction to Taxes

• Al Capone's tax evasion conviction exemplifies the inevitability of taxes.

• Historical context: In 1789, average American taxes were under 5%; now they consume over 25% of income. In Europe, tax burdens are even higher.

Importance of Taxes in Modern Economy

• Taxes fund government services that citizens expect (police, courts).

• Governments correct externalities, provide public goods, and regulate common resources, necessitating revenue through taxation.

• Earlier studies showed that taxes shift supply and demand and impact economic well-being through deadweight losses—where the cost to society exceeds government revenue.

Goals of a Tax System

• Most agree that taxes should be efficient and equitable; achieving these goals can be challenging.

12-1 An Overview of U.S. Taxation

Government Revenue Over Time

• Figure 1: Government revenue as a percentage of GDP has increased significantly since 1902 (7% to nearly 30%).

Major Tax Categories

• The federal government collects about two-thirds of U.S. taxes.

• Table 1: Federal receipts for 2014 totaled $3.3 trillion, or approx. $10,235 per average American.

(a) Taxes Collected by the Federal Government

• Most revenue sources:

  • Personal income taxes: $1,397 billion (43%)

  • Social insurance taxes: $1,145 billion (35%)

  • Corporate income taxes: $418 billion (13%)

  • Other taxes: $305 billion (9%)

(b) Taxes Collected by State and Local Governments

• Total receipts in 2014 were $2,225 billion (or $6,975 per person).

• Major sources:

  • Sales taxes: $525 billion (24%)

  • Property taxes: $456 billion (20%)

  • Income taxes (personal and corporate): 383 and 182 billion respectively.

12-2 Taxes and Efficiency

Objectives of Tax Design

• An efficient tax system minimizes total costs to taxpayers while raising needed revenue.

• Efficiency must balance the following:

  • Deadweight Losses: Loss in economic activity due to tax-induced behavior changes.

  • Administrative Burdens: Time and resources spent complying with tax regulations.

Deadweight Loss Explained

• Changes in taxpayer behavior in response to taxation reduce economic surplus.

• Example: A tax on pizza reduces consumption, causing a deadweight loss equal to consumer surplus lost but not matched by government revenue.

Case Study: Income vs. Consumption Tax

• Income tax disincentivizes saving—advocates suggest a shift to taxation based on consumption instead.

• Consumption tax: Taxes payments made from savings only when spent (often seen in European VAT systems).

Administrative Burden of Tax Systems

• Complexity leads to inefficiency; taxpayers require assistance from tax professionals to navigate loopholes and deductions.

• Democrats and Republicans often have differing views on tax simplifications based on individual interests.

Marginal vs. Average Tax Rates

• Average tax rate: Total taxes paid divided by total income.

• Marginal tax rate: Tax increase due to the next dollar earned. Essential for understanding tax impact on work incentives.

Lump-Sum Taxes

• A constant tax amount for everyone, regardless of income changes. Highly efficient but seen as unfair due to equity concerns.

12-3 Taxes and Equity

Principles of Fair Taxation

• Benefits Principle: Tax based on benefits received from government services. Example: Gasoline tax funding road maintenance.

• Ability-to-Pay Principle: Taxes should be related to a person's ability to pay, accommodating income differences and sacrifices.

Forms of Equity in Taxation

• Vertical Equity: Higher earners pay more.

• Horizontal Equity: Similar earners pay similar taxes.

Tax Systems Comparison

• Proportional: Fixed fraction across income brackets.

• Regressive: Higher incomes pay lower proportions.

• Progressive: Higher incomes pay a larger fraction.

• Debate surrounding the fairness of each system and how tax burdens are distributed.

Tax Incidence Analysis

• Tax incidence studies reveal that the burden of tax is often misallocated based on who pays versus who bears the ultimate cost.

• Flypaper theory: Criticism that overlooks fundamental economic reactions to taxation, leads to misjudgment about burden fairness.

12-4 Conclusion: The Trade-off between Equity and Efficiency

• The political history of taxation reflects changing views on efficiency vs. equity.

• Policymakers struggle to balance competing economic philosophies while pursuing fair and effective taxation.