Beyond the above, they can't cut a judge's salary but they can remove all funding for a judge's clerks for example. They can remove all federal marshals from courthouses (why does the judiciary have ANY enforcement power at all? Its not supposed to). They can disallow a judge's expenses. There are LOTS of ways Congress can punish even individual judges if they wish. The Republicans need to single out activist leftists on the federal bench and do a lot of the above. Stick these provisions into the federal budget. Then they can pass it through the Senate with a simple majority vote via Reconciliation - ie no need to worry about the filibuster.
Uh, no.