An overwhelming majority of Senate Republicans voted against Democratic-backed measures to block tax cuts for the wealthy

They know, they just don't care because they've been conditioned to believe that Democrats are out to ruin everything they've worked for through "tax & spend" policies, so "owning the libs" is far more important to them. The complexities of our tax laws work out in Republicans favor because most people don't even want to try to understand how taxing the rich won't hurt them.