It's the first step to building the top companies: You first need enough agglomeration of that labor so that, whenever there's a recession, you can scoop up some of that labor for a startup.

And as demand of those cheap engineers go up, salaries rise. It's not just Poland: Go see what happens to engineering salaries in, say, Spain vs Berlin. You find Capgemini opening offices, because the labor is that cheap. New grads making as little as 20k in some regions.

So compared to that, having big tech moving over and paying over local market rates, and expanding enough so salaries end up rising is much better than the alternative: They don't come, there's no money, the engineers emigrate, and the country becomes poorer.