You can say that about everyone. inf in the bank isnt affecting the economy. It is static, no matter if you are a farmer, marketeer or roleplayer. Players with huge accounts that see that their bid for 6 mill for that LOTG isnt hitting, raise it to 7, then 8 and are fine with paying 2 mill more than the going rate are what drives up prices. The borked purchase history doesnt help one bit with this either. I dont see any exploits, but there sure could be some improvements in the AH.
edit: and the oops I put one too many zeros in that bid..ouch I am pretty sure most of us have done this a time or 2.