i'm not going to get into a debate over unions (especially, in this situation where the employees don't have to join or pay dues in order to reap union representation - a majority signing cards authorizes them to represent as i understand it in a right to work state)...i've found that it's usually the small business owner and jr management who fears dealing with unions.
That said, not sure what unions you are familiar with

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ask anyone who belongs to a "good one" (teachers, steelworkers, etc. in the northern industrial states) if their union is benefiting them; you'd be quite surprised as to their support of the union.
Know that many unions re-opened contracts & gave concessions to the company in order to keep more of the rank and file working/keep jobs in the area; while retaining the salaries and benefits
fyi, "bad/underperforming" employees are terminated even in a strong union (after receiving the formal warning process and chance for improvement). Trust me, their union brothers don't want to pull a lazy bums' slack either.
You'd probably be shocked to know that most of workers hired in the last 30 years in our area's largest mill have college degrees.

Wouldn't surprise me to find out that the bullk of the servers in the better WDW TS restaurants are also well-educated and "the cream of the crop" certainly understand that they need all the bargining power they can muster.