Why is "The rate at which taxes are paid should be the same at all income levels" the right answer?

What principle of equity is illustrated by this diagram? * (0/1 Point) PROGRESSIVE TAXATION INCOME $25,000 INCOME $75,000 INCOME $100,000 TAX RATE 30% $25,000 $7,500 TAX RATE 25% TAX RATE 25% $12,500 $12,500 $50,000 $50,000 TAX RATE 15% TAX RATE 15% TAX RATE 15% $3,750 $25,000 $3,750 $3,750 $25,000 $25,000 TOTAL TAXES $3, 750 TOTAL TAXES $16,250 TOTAL TAXES $23,750 O The people who receive the benefit of the tax should be the ones paying for the tax. The rate at which taxes are paid should be the same at all income levels. The share of income paid in taxes X should vary based on ability to pay. O The government should reduce tax rates when it is receiving ample revenue