Behind the 435 members of the House and 100 members of the Senate, you'll find a small army of Capitol Hill staff employees. They do everything from walk members' dogs during holidays to detailed analyses of complex programs. For a couple of centuries these denizens of the Hill got few of the legal workplace protections received by their executive branch counterparts. That changed 20 years ago when Congress established the Office of Compliance. Barbara Camens, chairman of the board of directors of the Office of Compliance, joined Federal Drive with Tom Temin for a retrospective and look ahead.