As for criminalizing “waste”, you start to get dangerously close to criminalizing politics itself. Then it just becomes about controlling DOJ and using it to go after your enemies (this is already too true).
The better thing to do would with regards to intelligence agency abuses would be to have more review of the decisions, mandatory discipline of rulebreakers, and prosecution of specific crimes committed for egregious cases. No need to generally criminalize every time a government official makes a bad judgment call.