Reductions In Force do not require approval of Congress. They do sometimes require approval of appropriations to compensate or assist those being laid off.
The judge does not have jurisidiction nor standing to dictate what the Executive Branch can or cannot do unless there is a specific violation of specific Federal Law or the United States Constitution.
Appeal. Appeal. Appeal. So when these judges are up for promotions, their overturned decisions can be used against them in Senate confirmation proceedings.