Should civilians in the military have to PCS like military?

Those are very valid pros and cons. In general I think the value of having GS employees serve as our institutional memory keepers overall outweighs those who have poor attitudes. Remember, while it can be difficult in some cases, you can still fire toxic or underperforming GS employees. Nothing states you have to put up with their BS.

One more thing to think about is that mandatory PCSing of civilians would result in a sizable increase in the personnel budget at a time where they are trying to decrease personnel costs (although I can think of a few that would rater quit / retire if forced to PCS, and that wouldn't necessarily be a bad thing! LOL!)

I believe that they should Sir. However, I would note that looking at USA Jobs, there are positions that do not require or do not authorize relocation for said positions. I think this was done to mitigate moving expenses having to be paid by the military for civilians. Perhaps, like Senators, there should be a re-application process as well as a term limit. Civilians are only given a 2 year contract before they must re-apply for the position along with anyone else who wants to apply and can only serve in that position and role twice before it is required that they transfer to another unit or move to a higher grade position. There is a SGM from one of our down-trace units who works as a civilian with our unit as our finance accounts manager who has been there for 10+ years. He has the power to deny orders or training based on budget, but I often feel that his decisions are also influenced by his personal perceptions of the soldiers involved. I have seen many well-qualified soldiers get passed over for missions or training so that the "new guy" can go instead.