"enact a law that no federal employee can make more than a congress critter"
That just means they'll raise congressional pay. Plus dozens of ways to game this that I can think of without trying hard.
Other choices not offered:
* Eliminate patent protection for drugs and pay for research with direct NIH funding. Medicare/Medicaid savings will more than make up the cost of funding.
* Allow foreign-trained doctors to get licensed here. Let local docs see what foreign competition feels like.
* Same for attorneys.
* Require all congresscritters to use only the Medicare/Medicaid benefits available to civilians of their age. (This assumes we've already got the "everyone can join Medicaid" proposal done.)
* Financial transaction tax. Stop churning and make the inside-the-server-room arbitrage unprofitable.