Interestingly, there was a widespread belief (until recently) that the Nazis were afraid to invade Switzerland
because all the people there were armed. We now know that the Swiss were useful tools of the Nazis, being their bankers.
So the Advocate implies that the Swiss woud have STOPPED
being their bankers if thay had been occupied by nazis
and that Hitler did not CARE if his troops sustained casualties
because he did not need them.