This won't really make a difference to the jobs for MBAs. S&T jobs have been minimal for a while and will remain that way. I-Banking is like consulting - the attrition rate and numbers of cheap labor required to make the monster work is huge and will remain so (I repeat, and look at the research - M&A and Cap Mkts volumes are looking positive right now, and that is where the majority of MBAs go).
As for the competitive nature of the applicant pool... successful finance folk will always happily throw someone under the bus for their own benefit, so I can't see it being any different. Maybe a little more pressured.