In terms of workers, the govt can't go "out of business" so seems pretty rational to join a union in that context?
The other issue is politicans are total idiots. I've done enough work in govt to know that the folks making policy NEVER EVER ask the folks in charge of delivering on something what small changes would make things 100x more efficient, fraud resistant and more.
For example, PPP loans.
Everyone in govt knows that employers make payroll tax payments every other week, file quarterly reports and annual W-2's and W-3's for staff. So if you are going to do a paycheck protection program - two options. One, use the data YOU ALREADY HAVE ON FILE to auto generate loans (2.5 months of payroll) using a simple signup form with very little risk of fraud - funds can only go into the same payroll accounts deposits made from etc.
Instead, we got a totally stupid system where massive fees were paid to folks who had no clue to supposedly screen folks using easily alterable documents. The fraud if they care to look is going to be high AND the pain was extreme for folks applying. All of which could have been avoided. My point - a unionized workforce would not have messed this up as badly as a bunch of whacko political appointees with no clue, so I'm not necessarily against public sector unions if it helps with retention.