That doesn't sound any different from currently?
Lobbyists and Oligarchs already offer post-term positions to congressmen.
In fact they'd just have to pay more than they do now because instead of one guy for 16 years of service its something like 4 guys for 4 years of service each.
Oh, actually, this is after they talked down a ton of other Republican amendments including stripping reproductive care, denying refugees, banning CRT in military academies, etc.
But hey, the "must pass" part gives Biden the authority to sign it without Republican approval, because Republicans could actually try to drag it out to add in all of their amendments like they have been doing for many months, it doesn't literally force the congress to pass something before the time limit because there are no consequences for not doing so aside from the military going unfunded: which Republicans have demonstrated they would absolutely do.