It’s not the most pressing problem facing the country, but we need a constitutional amendment that would put some sort of check on the president’s power to pardon.
As it is, the president has a king-like power here. Why the founders allowed that unchecked power I don’t know. Presidents are not supposed to act like kings.
I’d be happy enough if the Congress was given the power to cancel a pardon by a 2/3 majority vote in both houses. Sort of like themeans to override a veto. Difficult, but possible.
I don’t believe the founders thought that the power of a pardon would be used very often and then only in acts of mercy or justice - not campaign donations.