Political philosopher: A just system of taxation would require each person's contribution to correspond directly to the amount the society as a whole contributes to serve that person's interests.
Conclusion
Each person should be taxed solely in proportion to their income.
Evidence
A just system of taxation would require each person to be taxed in proportion how much society serves that person's interests. The most objective way to determine how well society has served someone is wealth.
Evaluation
What is the reasoning flaw here? The author tries to establish that figuring out taxation by wealth is the most objective way of figuring out how much society as benefited each person, and then concludes that we should be taxed solely according to income.
2 thoughts: - is "wealth" the same as "income"? (wealth includes your assets, like houses and cars, whereas income just refers to how much money you receive each month or year) - is the "most objective" way automatically the best way? Should we "solely" go off the most objective way? Could we combine 'wealth/income' with other metrics?
Goal
We need an argument that lays out a way to measure something (tax should be based on how much society gives you). Then we should hear about the most ____ way of measuring that (maybe "objective", maybe something similar but different). Then we should get a conclusion that says that we should solely rely on that ____ way, although there will probably be a concept shift (like we had with wealth vs. income)
Premise 1: To determine X, we should consider Y. Premise 2: The best / most objective way to determine Y is Z. Conclusion: Determining X should be solely based on *Z*.