It’s the voters who are making the Faustian bargain—help the rich rob the poor on the chance that they’ll use some of that money to offer you a job.
The part of the bill that’s truly diabolical, though, isn’t the Medicaid cut as much as the fact that it gives preference to the red states—the states whose senators are calling for those cuts—in how the remaining funds are distributed. Apparently, the more “fiscally conservative” states will spend it better, and that entitles them to siphon additional tax dollars from states like New York to fund the same social program they say they want to dismantle.