Bullshit. Five days after unions disappear, they'll be needed again.
Today's UAW? I doubt it.
Obviously, if unions disappear, that would include today's UAW. But a new union would soon arise, because you can bet your ass the rollback that some would love to see wouldn't stop at just eliminateing unions, but getting rid of nasty things the unions brought, like the 40 hour week, those unfair child labor laws, etc. Though I'm sure the same people who championed the great idea of unregulated financial markets would pooh-pooh my concerns as unrealistic and paranoid, but we've seen what the world looks like without unions, and in a capitalist society, it looks strangely similar to slavery.