A) Most do pay enough and most making low wages are usually students or teenagers at an entry level job and they still live with their parents
B) The number of rich who hide money offshore is quite small.  Most rich try to reduce their tax load by using as many deductions as possible, but that is perfectly legal and ethical.  If you want to stop so many using them, make the top tax rates more reasonable.  No one in their right mind is going to willingly fork over 50% of their income to the government.
C) Yes and no.  No in the sense they don't have to, yes in the sense it reduces their tax burden.