Let's consider some actual numbers, though: In 1999 I got my first "corporate" job at a starting salary of $50K. I was paying $800 a month for a two bedroom apartment, and what was left over was enough to comfortably support me and my wife. Entry level salary for the same job is now about $120K, meaning someone in that position can easily afford to pay $1920 a month for rent. According to Zillow, that same apartment is now renting for $2305 a month.
So what we're hand-wringing about is a ~$385 increase in rent, which comes to about 4% more of the person's gross salary than 25 years ago. That sucks a little bit, but it's not a catastrophe.
And on top of that, you can still make a ton of side money through bonuses and stock, in the industry that I assume we're mostly talking about. A few months ago I gave a $90K stock grant to a guy. Even if the stock price stagnates, that on its own is almost half his housing costs for the next five years, and it's all because he works harder than the guy in the next cube over.