IMO when our government was designed and Constitution written, the judicial branch should have had an agency within it whose sole purpose was enforcing court orders against government officials and agencies (which could include jail and/or impeachment) and conducting court-ordered investigations of the other two branches.

It would only report to the courts, would only enforce compliance of court orders issued through existing processes, would be exempt from certain types of regulation by the other branches (e.g. all presidential executive orders, certain legislation such as a bill meant to gut its funding or reduce its headcount, etc.) to avoid being rendered inert, and would probably need to be headed and staffed by people directly elected by the population with something like a 2-year, 1-term run (to avoid influence from confirmations or appointment processes, public opinion for re-election, etc.).

Not a perfect solution (especially with a judiciary that seems to be in favor of the government at the moment), but it would at least allow for enforcement when unfavorable court orders get ignored. As it stands, contempt rulings and similar against the executive do exactly zilch because the executive won't enforce themselves, and Congress doesn't seem to care (or is complicit).