Because of the the united states does indeed have a(n) income tax, progressive tax system income tax, regressive tax system property tax, progressive tax system earned income tax credit (eitc), regressive tax system sales tax, progressive tax system

I believe the answer is: progressive tax system In a progressive tax system, we impose different tax rates to the people whose earning reach a certain income bracket. With the purpose of ensuring proper amount of wealth allocation. In united states, the separation for each bracket would look like this: Taxable Income             Tax Rate$0 - $9,525                10% of taxable income$9,526 - $38,700    $952.50 plus 12% of the amount over $9,525$38,701 - $82,500        $4,453.50 plus 22% of the amount over $38,700$82,501 - $157,500$14,089.50 plus 24% of the amount over $82,500$157,501 - $200,000$32,089.50 plus 32% of the amount over $157,500$200,001 - $500,000$45,689.50 plus 35% of the amount over $200,000$500,001 or more         $150,689.50 plus 37% of the amount over$500,000

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answerjointly by the fed and by the behavior of individuals who hold money and of banks in which money is held;