Do you know if the businesses would pay on net sales or net profit?
It is obvious you not only have never owned a business but also have no idea how difficult it is to make a profit. These taxes have to be paid on profit. At the 15% rate connsider it is common for a small business to have over 1 million in sales. It is extremely rare for a business to have 15% profit. If the tax was 15% of sales then almost all business with over 1 million in revenue would be in the red after paying taxes.