Final answer:
A congresswoman who supports wealthier Americans paying a greater percentage of their income in taxes would likely support the current progressive federal income tax system.
Step-by-step explanation:
The current system implements a progressive tax, in which the tax rate increases as the taxable amount increases. This means that those with higher incomes pay a higher share of taxes out of their income than those with lower incomes. In contrast, a national flat tax would have everyone pay the same percentage, regardless of income, which tends to be more burdensome for those with lower incomes. The Fair Tax proposal typically refers to a tax on consumption rather than income, which can also be regressive. Lastly, a more regressive income tax system would impose a heavier tax burden on lower-income earners relative to wealthier individuals, which would be counter to the congresswoman's view.