Where is this?:)
http://www.boozallen.com/ they start you at 16 or 17 days PTO after 5 years it's bumped to 21, but all the other benefits stay the same.
PS: I know plenty of people who work insane hours there. But, it's not 'required' just useful for promotions etc.
Ignoring sick-leave and training that works out to 30 days / year off, they don't let you cash it out and there is a 25day cap designed to get you to actually use that time off. (Most people end up taking a month off every other year or so, they also let you go a little negative to encourage longer vacations.)
PS: They also do maternity / adoption leave, and give separate time off for funerals etc.