I think a law should be passed that all Federal, State and Local legislators, all Governors and Mayors, and their subordinates, and the US President, VP, the President's cabinet and advisers, all the members of the President's administration, etc. must take and be required to pass mandatory random urine testing as well as passing a mandatory urine test prior to moving into any of the afore mentioned "Public Service" positions?
That law could only be passed by public referendum, because few in the above categories would pass or support that law.
That law might also "clean house" because many "Public Servants" would not want to be treated the same way as the public that they serve is treated.