They thought of your point when they wrote the Constitution. Giving any branch the power of punishment over any other branch implies control that forces the ali

They thought of your point when they wrote the Constitution. Giving any branch the power of punishment over any other branch implies control that forces the alignment of interests between branches. Truly countless examples of tyranny under those conditions. The whole point is that Congress can fearlessly pass laws that the judicial branch can piss on and the executive branch can choose to ignore. That gives Congress an incentive to pass decent laws while protecting them from the tyrannical overreach of say, a militant dictator, or a self serving judge. If you meant for a branch to punish its own, there are indeed consequences for upsetting Congress as a congressman, the Justices as a justice, and the federal government as an agent or serviceman. Plenty of people have received harsh penalties. It's really not uncommon.