The majority of the part time Cast eliminated were in the parks by my estimation (and that's what most of this discussion centers around, park Cast), so there's no office space to maintain for them, and the break areas are built into the park and don't impact availability of guest areas or even expansion. I doubt the stock of costumes currently in use will be immediately reduced, or even over time before costumes reach the end of their natural life. They'll just continue to hang on the racks unless they seriously downsize those facilities (again, I don't see that as likely). Management was, I'm sure, laid off in accordance with the cuts being made to the hourly staff, so that does get a bit tricky, but...can also open up advancement opportunities for those below depending upon the path you take and how you view things wrt management layoffs. Obviously there's some management you don't want to lose, but I suspect that natural attrition through long term furloughs would have taken care of them if they're unable to be called back (i.e. more likely to get a new job) quick enough. HR costs...I'm murky on what exactly those might be and doubt they would amount to that much in the grand scheme of things, but I'll allow that I'm likely wrong and it's a big enough factor. Support staff for park Cast is (to my understanding) likely to be very low per CM. For instance, I suspect the Cast Service Centers would likely be staffed by the same amount of people if they're open currently as they were before COVID, Costuming was largely automated on the front end, etc. Again, I might be wrong on the last few, but that's from my understanding.
I think there's an assumption that a lot or all of these 28k would hang on indefinitely, and I think that's far from what the reality would be. The layoffs are taking effect roughly when extended unemployment benefits will be running out, I believe (at least for FL, as things currently stand with no further federal aid, CA might be different), which means people will need jobs regardless. I'm also assuming that benefits are continually reduced as furloughs drag on (possibly with a complete ending at some point), further incentivizing people to seek other permanent employment. To me, this is a potentially "better" way to handle the situation both for both PR purposes and to those affected that doesn't (at least to me) appear to change the end result for the company in a meaningful way vs announcing that number of forced layoffs. Obviously there's no way to avoid some layoffs in the current situation, but it seems like this massive targeting of part time doesn't have that big of an immediate or near term payoff when they weren't working (and there will still be a large number of full time continuing on furlough beyond the new year with Disney paying for their health insurance premiums if things continue as they currently are) and being paid, anyway, and the HR support was already downsized/furloughed accordingly.