Re: BT should return ALL the subsidy...
I think you'll find that BT Openreach and BT are the same company. If you check Companies House, there is no separate company.
BT Openreach can simply jack up their wholesale prices and BT retail can simply reduce their margins, the overall group still makes a profit on each internet connection provided.
In fact, BTOR jacking up wholesale prices means that they make their resellers more expensive and thus benefits BT Retail.