Eve is real time progression how does its skills work (real time passes to learn) and through skills you are enabled to utilize certain features. and with no "Defined" endgame it has no Real endgame just what players spend there time doing. so when we talk End Game Content, you would say well there is none, the content exists the same across the board.
also changing the currency generation would lead only to a currency value change therefore would not ruin the economy. so that's not really the issue. but this proposal does not fix anything... as a matter of fact your merely milking more money from a subscription game, it would create gil sink issues, and solve nothing.. so again it is easy to see how this system wont work. also there is tons of RMT in eve...