I just think they suit certain types of people and certain situations.
How much does a foundation year cost? is it the same as a normal year of uni ? i.e £9,000 plus maybe £6,000-£8,000 in living costs. Plus you use up your spare years funding.
Price of A level resits? less than £300?
Youd have to look at what the state of your studies are and whether resits were viable from an academic perspective. If you dont mind the debt then go ahead, but make good use of soemthing you are taking on extra debt for.