Anyone in a union can be removed. Just follow the specifically contracted methodology of removal.
FYI virtually every union has ' commit a felony ' as a valid grounds for dismissal. Police officers don't get dismissed because the legal apparatus (and juries) can't convict cops of felonies.
Most people are at the whim of dismissal at any time. Living under that yoke certainly provides an easy perspective to feel envy and frustration. And, it is, a yoke, that is, to have your livelihood, the resources necessary for your survival, at the emotional whims of a human. An animal, an ape like we all are, to have your life in the hands of someone's secret loathing and biases, pack social hierarchy bullshit. Under that chain it must seem insane that people can have peaks and valleys throughout their life/career and not see their survival fortunes adversely impacted.
Unfortunately it often seems we must return to the obscene conditions present in the late 19th century before people will have enough of the arbitrary whims of others for their bread and butter.
Edit: Particular to gaming, it's quite fitting voice actors will now have a larger stake of most big budget games than the actual designers/developers thanks to their union.