You meant a government job in DC perhaps because this don't apply to the average government worker. You have to pay into your pension, it's called FERS, they match up to 5% (same as big companies), you don't get a car or gas cards, (you have a car to drive at work if your jobs requires it that is filled up for free but not for your personal use), you choose which health insurance you want (the same companies that's available to private companies at better or worse rates), tuition is reimbursed only if you pass and it applies to your job (big companies have this also), the pay may or may not be the same as a non governmental job. You also have to factor in that some jobs don't really translate to the civilian market.
I once turned in an expense report and was essentially ‘ordered’ to make it more. My supervisor told me that other people had made a similar trip as mine and I was making them look bad. Uh....OK, says I. Wild.
And you could go anywhere in the world all expense paid, and on top of it, you get $100 a day in per diem. So, I was getting paid to be on what was in most respects, a vacation.
It does depend on where you work, but if you get in the right dept, ... wow.