Sure, but can management unionize and get protection? They’re clearly a different class of employee.

So management is employees with worse legal options?..

(A quick search seems to say that managers can't join most unions, but there might be some they can join. There seems to be no legal barrier, but rather that existing unions don't want them, and that managers seldom ask to join.)

There are some unions that allow supervisory employees to join, like AFSMCE (the largest public sector union in the US).