Awkward moment when you want to do PPE/Politics and Econ...
Tbf though it's because I have a serious interest in politics and econ above any other subject, and though I'm not aiming to be an MP, I do want to work in politics.
I'd agree though that people who take these subjects thinking it's a blagger's degree to power are probably overestimating just how useful PPE is or politics for that matter, it's one of the few courses that as the quality and prestige of your uni decreases, it becomes a lot more soft and probably a lot more useless, which is why I sorta have to get into a top uni...
With that in mind I'd still say finance. In my experience, people who do finance or accounting of some sort think it's a one way ticket to become a successful entrepreneur, banker, accountant or whatever. In my school it's the single most popular choice for people without any actual serious interest in a subject who don't really know what they want to do. Realistically maths is a lot more useful for banking and accountancy, and entrepreneurship or management of some sort does not in themselves require a degree. Finance has its uses but from personal experience, it's highly overrated.