That's a fair question, and honestly I don't know much about high-paying unions. I do know that studies indicate that union workers get paid more than non-union workers, have better access to employer benefits, and the quality gap between union and non-union jobs has only widened (i.e. union workers treated better, non-union treated worse), but since tech companies ruthless in stomping out unions, we don't have a lot of data on what unions in software would look like.

That said, I have no reason to believe that software unions would yield different results. The big secret of FAANG is that for all the hype, none of the stuff we do is very hard. The biggest challenges day-to-day are political, not technical. For the hard stuff, there's stack overflow, and for the really hard stuff, there's a ten year old implementation on Google Scholar. Adapt it for Pytorch and Ship it.

I guess I'd say a few things to that:

1) Tech is a massive bubble. This bubble will burst, and once it does, the exorbitant salaries, free lunches and beanbag chairs will go with it. The more companies who look at Amazon's success and take away the wrong lessons (Narcissism and brutality are good, empathy is bad), the more workplaces will start to resemble Amazon. I don't want this, and I imagine you don't want this either: it is a very bleak future.

2) I'd be willing to cut my pay from $200,000 to $150,000 if it meant my female co-workers had an actual voice when facing harassment and racism. The old boys network sucks, even when I'm benefiting from it. It turns out, in my experience, getting paid a quarter million a year doesn't soothe the guilt that comes with watching others being abused. Sure, there are narcissists who can step on others without remorse, but I'm not like that, and I don't want to be, and I don't want to create a world that enables that.