This is one reason why.
The U.S. federal effective corporate tax rate has become much lower than the nominal rate because of tax shelters such as tax havens.
So how do you ensure corporations pay what they use to pay, when our economy was strong. While allowing them to have the Capitol they say they need, to create more jobs?
A Fair Tax maybe?
Would you pay a doubled tax rate on new purchases, if you didn't have to pay income taxes and file returns every year? While everyone who has the disposable income, contributes the tax system. Including all the new contributors like drug dealers, mobsters, bookies, criminals, gamblers, etc. while simultaneously cutting back on governmental entities. e.g., IRS. That are needed for our current overly complex and inefficient Tax system.