> If a union wants to negotiate, then you just move the manufacturing to a cheaper country.

This is a disingenuous comment. Having a professional negotiation negotiating with a HR representative on behalf of the worker does not force a company to move their offices abroad.

Moreover, moving a company somewhere else entails a heavy cost that more often than not the company is unable to pay.

I don't understand why people assume that the worker force has to bend over repeatedly and perpetually, particularly when we are faced with stagnant wages in a time of low unemployment. This clearly shows that the job market is being manipulated to serve the interests of these corporations, in a time where high-skilled workers remain peddling for cash and without any job security.