Why is this not the solution?

[Almagnus1]

I am asking for gil to be removed from the system so that people with less gil will be able to buy more things. Without a bunch of old money tycoons who have nothing better to do with their gil inflating the market, you will not see RMT bots going for housing, because it won't be worth it to them. This means fewer people clicking the placard.

That would do the exact opposite, because one of the few things keeping the demand somewhat in check is that 3M gil (or however much the house is) takes a bit of doing for most people to get a house, so not everyone has the gil for it. You remove that limiter then EVEYRONE will go after houses.