This all sounds very good in theory while hanging around waiting to ORD, but ask yourself this:

If anyone can take an engineering degree, go into finance/banking make the big bucks and then run back to engineering as "insurance" the moment things are not looking well, why the hell would anyone bother to spend time & money to major in Finance or do a MBA from a top notch university???

Only 2 possibilities:

1) Somehow you are one of the few chosen ones who have discovered this unique patented way of planning your career or

2) Your scenario not realistic

I trust you have enough common sense to know which is the correct answer.