All unions have the right to exist. The First Amendment protects the right of free assembly. So shouldn’t workers be able to freely assemble, and form a union? I find that argument to be very persuasive. If two (or two million) workers want to gather together and agree on a common goal, that is their right.
Ah, but here’s the thing. Employers should also have the right to ignore a union, and fire any and all striking workers. Replace them with people who are willing to work. But in too many jurisdictions that option is no longer legally (or politically) possible.
It’s no longer a level playing field.
FDR, the most famous of “progressives” wrote convincingly that government unions should not exist.
Governments are by themselves a monopoly, and they work for the public good and under public direction. A union of workers promoting their own interests is therefore automatically a monopoly, and unjust control of money and services that citizens are forced to use and pay for. Indeed, worse than any private corporate monopoly.
Public sector unions can twist, deflect, or ignore the will of the public, and are automatically therefore unelected political players.
They are the definition of both malfeasance, and tyranny.