A union isn't the answer. A union will get you what Hollywood has - contract workers rather than employees. That's even worse than what we have now.

EA isn't as much of a problem as they were, anyway. They do far less buying and razing awesome studios these days. They don't have the buying power, but I think they've learned that lesson. A bit.
The issue now is more just a function of no one understanding what to do about how much it costs to make a game with cutting edge graphics. Most studios decided the way to handle that is by reducing single player to 6-7 hours.

It isn't just games dealing with this, either. Look at Hollywood now. The most expensive movies of all time are the ones heaviest with CGI - movies like Oz Great and Powerful which is 100% greenscreened cost over $200MM. Nuts. And then the artists doing those effects get laid off and the studios get closed weeks after winning awards.
Don't know the answer. Industry leading computer visuals are just extremely expensive...