All taxes should be corporate taxes based on revenue, not profit, so NO deductions or loopholes. It should be progressive, so that as the company brings in more revenue, they are taxed at a higher percent.

No level of the supply chain is exempt. If it takes four middle-men to get me my item, each middleman should be likewise taxed.

This will keep business from getting too big, help prevent monopolies, and help support producers who work with their customers directly.

Business will need to balance owning a larger portion of the supply chain with getting too big. The precise percentages can be adjusted as needed to have the best effect.