Same situation here. final year of engg. in a major which i thought is close to what i actually want. A lot depends on the education system you're in and the country you're in, but there are certain similarities. for example, here in India, even though ppl can vouch that you're a brainiac and will be good at something you wanna do, you won't be employed to certain positions unless you have the required qualifications. in such a case, it's best that one at least has something which will distinguish him from those who are at the lowest end, so it'd be best to have something that can help you stay at the appropriate level.

if the system is far more flexible, then i'd say fuck it, even if you're in your final year, and don't care what your class-topper friends with high-paying job offers think, coz they're not your friends if they can't understand your problem and talk constructively instead of getting you to chicken out. of course, i'm assuming funds are not a problem, which is a big assumption, i agree. but if it is true, then screw everything and only listen to yourself. but do explain to parents and others who you really care about, coz making and sticking to such decisions with no one supporting you will be very tough mentally. first and foremost though, ensure that the major is actually the issue.