because how a barista lives is not how a well paid programmer lives. Yes, you can exist on $15k/year, but if you're used to living on $100k/year it may as well be homelessness. If you're someone that provides value to a company you come to expect to live like you provide value. Quality of life matters, a lot.
Of course you're right overall, but if you're paying $12K/year in rent for one room in a shared apartment that still leaves only $250/month for all your other expenses, and I'm not convinced it's workable at that extreme.
Hence, often they have two jobs. The lower economic class in this country is worked to the bone and just scrapes by.
The Zynga employee who is going to make $0 (or negative if they exercised unvested) options is still much better off: a) they have a job and b) they are still likely very hireable if their job disappears.
The folks at Facebook should probably be a bit more worried - Zynga and Facebook have been close and without the symbiotic relationship, Facebook's appeal is much diminished - lots of my social gaming dev friends are now working on mobile freemium games, for example.
I don't see this connection. Facebook is a lot bigger than the games platform. They appeared and then died off as a fad within my friend group, and aren't really used anymore.
Make ends meet != live well