It will start going off into the political but bigger companies just have
more regulations: SOX, healthcare requirements, etc because the mentality
is big = evil (confirmed by many of your comments) or by the belief that
they can somehow afford stuff that the smaller guy cannot (there may be
some truth to the economies of scale there). And some businesses just
also have a much lower profit margin and not because they are padding
executive salaries. The food industry for example.