Why am I not allowed to work part-time?

[Mempho]

I don't understand this about American society. Why can't I take a job doing something in my degree field (accountancy) that pays a comparable hourly rate (notice I didn't say that it paid the same....just that it is comparable on a per hour worked basis)? I could get the same volume of work done in 60% of the time anyway because of all the bs. Why is it unacceptable for someone to work in an "educated field" and work less time? I don't understand this...everywhere else in the industrialized world, this is excepted...just not in America.