Going straight for a masters degree?

[FastTrackDegree]

Hi. I read quite a lot and my plan was to get a BS in Accounting. However, I read that some UK universities like Herriot-Watt could let you just do a exam test and get the Masters? This way I could by pass a lot of liberal arts nonsens and then get my CPA etc. How does this work? Basically, could I not just take a bunch of accounting classes for a year for free online and learn everything and maybe get a personal coach for it then take the exam and finnish the degree?

Maybe I'm missing something?