They could also impeach justices, but they don’t. A power not used is no power at all.
This is a power that the congress has almost completely ignored. If you leave it up to the SC to be the final arbiter of a law and they strike it down then the congress can blame the court. If the congress puts in a clause removing appellate jurisdiction from the SC then the court has no power. But if the court presumes to take a case and strike down the statute despite the clause, you have a court ripe for impeachment. If congress then does nothing you have a practical change to the constitution without amending it. Then you have two bad branches of government. Throw in a usurper president and the tinder is all there for an explosion.
You can always trust a Republican dominated congress to let us down. It’s their specialty. Just like you can trust a democrat dominated congress to stab us in the heart. Harming America is the specialty of the left, and letting them do it unmolested is the specialty the right.
Trump 2016!
Congress is Impotent, they can also just ABOLISH Any Federal Court they wish, remove ANY Judge for whatever reason they want, they refuse to do Anything, and have for years.