RMTs make business in situations like this where there is a significant lack of economic gil influx. When people can longer sustain their characters, they will either leave or resort to buying gil from the RMTs. If SE is able to implement a system with economic gil generation is easier to compensate for the gil sinks, RMTs will have a harder time making bank because gil is more accessible without them. There will be those that give in to temptation because they are either lazy, or just really really bad at managing money. However, RMTs will only get worse the worse the gil deficit gets.