Societies, Facts and Challenges: lecture 4

mind the gap: inequality, taxation and redistribution

Efficiency

specifically refers to Pareto efficiency, a situation where it is impossible to make one person better off without making someone else worse off. It requires that nothing is wasted and the “total pie” is maximized

equity

a normative criterion concerned with wether ourcomes are distributed or shared in a fair way. While a market may be efficient, it does not necessarily lead to a fair allocation

egalitarianism

a vision of fairness focused on the equality of outcomes. The rationality is that everyone should have an equal amount of resources to avoid societal inequality

sufficientarianism

a vision focused on the adequacy of outcomes, ensuring everyone has “enough” to avoid poverty. Unike egalitarianism, it is not concerned with the inequality between those who already have enough

lump sum transfer

a theoretical transfer where the sender and receiver cannot change the size of the transfer by changing their behavior. Because it does not distort behavior, there is no efficiency loss

leaky bucket transfer

a metaphor for real-world redistribution where the amount received is smaller than the amount sent. This happens because people adjust their behavior (e.g. working less when taxes rise), leading to a trade-off where more equity results in less efficiency.

redistribution

measures taken to cure inequalities after they have occured, such as progressive taxation or income support for the poor

predistribution

measures taken to prevent inequalities from emerging in the first place, such as education policies, minimum wage laws and labor market regulations

average and marginal tax rate

the average tax rate is the total tax paid divided by total income. The marginal tax rate is the rate applied to the last euro earned (represented by the different “tax brackets”)

progressive taxation

a system where the average tax rate increases with income, meaning the rich pay a larger proportion of their income than the poor

regressive taxation

a system where the average tax rate decreases with income, meaning the rich pay a lower proportion of their income than the poor

direct taxation

taxes paid directly by taxpayers to the government, such as personal or corporate income tax

indirect taxation

taxes paid indirectly through another entitiy, such as Value Added Tax (VAT/BTW) or excises paid via a firm

Lorenz curve

a graphical representation used to show the distribution of income withing a population (implied by the global income distribution charts)

Gini coefficient

a standard statistical metric for inequality ranging from 0 (perfect equality) to 1 (or 100) perfect inequality

inequality paradox

often refers to the trilemma between efficiency, equity, and political support. It suggests that while “selective” policies (targeting only the poor) might seem more efficient for redistribution, they often have less political support than “universal” policies that also benefit the middle class, potentially leading to less overall redistribution