So the real question is should they continue to enjoy this oversight.
I suppose the eventual taxation of all online commerce is inevitable.
Seems to me that if the present conditions continued, eventually tax would be forwarded to carriers(UPS,FedEx,USPS). Maybe this is pessimistic but I see all online purchases being charged sales tax in the future. Of course, the bureaucrats will have to set up some system for that, which will take years if not decades.