There is a huge difference between a company town, feudalism, and Facebook building company housing. Comparing FB to them is an insult to the people that suffered under those systems.
First of all FB employees are paid very well. If they decide they don't want to work for FB anymore they could find a new job in less than a day. They can easily afford housing elsewhere. FB doesn't own all the businesses in the area and isn't paying its employees in vouchers.
They pay well... if you're and engineer. And male.
From the article I linked above:
"I was promoted to a more demanding managerial position. But there would be no raise. “You’ve already doubled your salary in a year and it wouldn’t be fair to the engineers who haven’t had that raise” (never mind that a year earlier engineers had been earning anywhere from $70,000 to $140,000, as opposed to $38,000 like I had)"
$38k doesn't go terribly far in Silicon Valley. After doubling it with a promotion.
And I direct you to my other replies, where I yet again point that I didn't say it was there NOW. Instead, we face a very bad risk of them becoming a Company Town in the future. They are exhibiting dangerous warning signs, and nobody in power even attempting to stop even their flagrantly illegal activities.
First of all FB employees are paid very well. If they decide they don't want to work for FB anymore they could find a new job in less than a day. They can easily afford housing elsewhere. FB doesn't own all the businesses in the area and isn't paying its employees in vouchers.