Getting rid of double taxation from corporations would essentially mean getting rid of business deductions. Which means that companies would have no extra incentives to spend their money on business expenses such hiring because they'd get taxed either ways. The corporate taxes are working fine and most companies aren't avoiding taxes so much as being incentivized to spend their profits on hiring or giving out pay raises. Think of it is coerced minimum wage increases in lieu of corporate income taxation.

Double taxation on income and then on your food is just extra tax revenue, and nobody's going to stop eating because of it, though you might eat less expensive. Some places do indeed do not have taxes on basic food.