What happened here is not even 'price-fixing', it's a fairly weak attempt at 'collusion'. Yes, it seems improper at first blush and the email exchanges are almost comically incriminating, but my guess is that it didn't really have a substantial effect on the engineer salaries write large (or even executive salaries). Agreeing not to cold-call employees is not the same thing as refusing to hire them; that latter would have had a major depressing effect on wages (kind of like if all MLB teams had a handshake agreement to never sign another team's free agent) but that clearly isn't what happened here.
It seems to me like the proof is in the pudding. If big tech companies are colluding to depress engineer wages, they're pretty obviously failing.
Anyway, I have no idea how this lawsuit will shake out, but I know that Pando Daily is doing a shit-ass job of reporting, and I regret clicking on the link and giving them the additional pageview.