I'm paying 14k for an arts degree upfront without sponsors or any form of government bursary, don't know what people here are banging on about tbh.
I don't want to regurgitate what everyone else has already said, but I think it's what you do in between the degree that counts. I have a cousin who just completed Chemical Engineering with a year's industrial placement at a good university, and got a highly paid job barely months after graduating. In contrast, a friend of mine did the same course at a university no less respected, and hasn't found a job since, because he didn't bother looking for relevant work placements.
Arts degrees are no different. No one is stopping History/Politics graduates getting jobs if they spend time looking for relevant internships/part-time work and beefing up their CV with leadership skills from societies etc. If you spend the three years ****ed drunk and lazing without giving a damn about anything, you're going to get what you deserve after graduation, whether or not you do an arts or a science degree.
I think the main point of the OP is the contact hours -- we humanities students have so much reading to do in between our lectures, thank god for limited contact hours!