> Nobody buys prepared food every day, and the costs of food are negligible for a Google employee.

Of course they do? When I've been crunching, like just putting insane hours in, I've gone weeks without cooking and just ordering in. It costs a fortune, even at Google salary - or in my case, 'SF' salary. Not to mention the cost of living is already absurd due to rent - your salary gets eaten up faster than you might imagine.