If he doesn't like the pay that's fine. Resign now and return to the private sector. BTW Washington, DC was never intended for our elected leaders to establish their residency there. They except for POTUS were expected to return home as in home state when not in session and it should be required they do so now. The District of Columbia and immediate outlying areas have now become the most represented area in the nation due to career politicians now living there permanently.
I remember Ross Perot talking about congressional perks. He said they should have to pay for their own long term parking at the airport, fly coach and “eat lousy meals like the rest of us.” Nobody in congress liked hearing that.
It always pisses me off when I hear people complaining about their jobs as though they’re being force to work there.