Except it is. You're only considering this from a union PoV. Corporations are not endless pits of wealth extraction waiting to be tapped by a union, you have to consider what the consequences would be outside of the aspiring utopian objectives.
What does the games industry look like if it takes 1-2 more years to create the same products and with significantly less people?
Where do all the formerly employed QA testers, developers, project managers, etc. go? Start their own business? With what capital? Do they have to pay union rates and fees too? If so, how would it not be somewhere around 5 years before they can make a game? Thats an unsustainable model for anyone but the largest most profitable corps.