Those who cannot make it as Wal-Mart greeters join the TSA.
Those who cannot make it at the TSA join ICE, where they get to wear face condoms, and prance around our nation's capital in packs, hassling dark-skinned folk, picking on women, and ready to pop a cap in any parking violator they encounter.
As for patrolling Southeast DC, well that's left to the DC Metro cops, because that part of town is too scary for the odd Park Service or airport cop, and the dark people there are mean to those on patrol...
Having a cushy job in Congress or in some statehouse job sure beats selling insurance, or chasing ambulances, or a dozen other joe jobs many of these pols gave up to go into political graft...