Unions haven't been about protecting workers for a very long time...

The labor movement takes its pound of flesh:

"As a matter of policy, it seems ridiculous to give federal contractors money to lobby against a union. On the other hand, taking down notices that workers have rights against the union seems to be frankly pandering. The rhetoric about unions always focuses on the workers, but an awful lot of the actual policy seems designed to enhance, not the power of the workers over their employers, but that of the union over the workers."