This is a genuinely contested policy question where reasonable people disagree based on differing values and economic assumptions—not something that has a factual "right answer" I can search for or verify. Let me share the main considerations on each side so you can weigh them yourself.
Arguments for raising taxes on the wealthy:
•Ability to pay: Marginal utility of income decreases as wealth increases—an extra dollar matters less to a billionaire than to someone struggling to pay rent.
•Rising inequality: Wealth and income inequality have grown substantially in many countries over recent decades, leading some economists to argue current tax structures aren't doing enough to offset this.
•Revenue needs: Governments face funding pressures (infrastructure, healthcare, climate, debt), and taxing the wealthy is one lever to raise revenue without affecting lower earners.
•Effective vs. statutory rates: Some high earners pay lower effective tax rates than middle-income earners due to how capital gains, carried interest, or other income is taxed—raising concerns about fairness within the current system, independent of top marginal rates.
Arguments against raising taxes on the wealthy:
•Investment and growth incentives: Higher rates on capital and high earners could reduce investment, entrepreneurship, or risk-taking, potentially slowing economic growth.
•Capital mobility: Wealthy individuals and capital can move to lower-tax jurisdictions, potentially reducing the revenue actually collected (a concern with wealth taxes and high marginal rates alike).
•Already progressive systems: In many countries, high earners already pay a disproportionate share of total income tax revenue relative to their share of income, which some argue is already sufficiently progressive.
•Efficiency concerns: Some economists argue broader-based taxes (consumption taxes, closing loopholes) raise revenue more efficiently than higher marginal rates, which can incentivize avoidance.
Middle-ground/alternative positions:
•Some argue the debate should focus less on marginal rates and more on closing loopholes (e.g., step-up basis, carried interest, offshore shelters) so effective rates match statutory ones.
•Others favor taxing wealth or unrealized gains rather than just income, since much wealth accumulation for the ultra-rich isn't captured by income taxes.
•Some propose consumption taxes or land value taxes as more efficient alternatives to income-based approaches.
Where you land often depends on how you weigh fairness/equality against growth/efficiency, and how much you trust government to spend additional revenue effectively versus leaving capital in private hands. If you want, I can dig into specific data (e.g., current effective tax rates by income bracket in a particular country, or economic studies on how tax changes have historically affected growth/revenue) to help inform your own view.