One proposed reform was to give corporations an obligation to explain the difference between their profits declared to the IRS (as low as they can get away with) and their profits declared to their shareholders (accurate, because they want people to buy their shares).

Both declarations are available to the IRS; if you force corporations to declare how they "bridge the gap", while it would let them practice tax evasion, it would make it easier to assess what form that evasion takes; and it would make fraud much harder.

I don't remember if it went through.