What term refers to equitable treatment of taxpayers at different economic levels?

The term that specifically refers to the equitable treatment of taxpayers at different economic levels is vertical equity. This concept is primarily based on the principle that those who have a greater ability to pay should contribute a larger amount of tax compared to those with lesser means. It reflects the idea that taxation should be progressive, ensuring that higher-income individuals or households pay a higher rate or amount than those with lower incomes.

Vertical equity aims to create fairness in the tax system by aligning tax liabilities with taxpayers' economic capacity, thereby addressing disparities in income and wealth levels. This approach is essential in public finance as it promotes social equity and can enhance the overall fairness of public revenue collection, leading to more acceptable public funding measures among citizens.

In contrast, horizontal equity refers to the principle that individuals with similar abilities to pay should owe the same amount in taxes. Revenue goals are targets set for the amount of revenue to be generated from various sources, while earmarking involves designating specific revenue streams for particular expenditures. These concepts, while related to tax policy and budgeting, do not directly address the equitable treatment of taxpayers across various income levels like vertical equity does.