How will we do this?
Or... Was that all of your solution? You make it sound so easy.
It's actually all quite easy. The only reason we are in this mess right is now because Jagex has quite literally sat on their ass for years doing absolutely nothing about this problem, except for a few half-assed things here and there, and then just throwing their hands up in the air and sighing, "well, we tried, back to something else". If they had kept up from the start, we wouldn't be here, or if they just took extreme measures at the start, it would be completely prevented.
Just take the dicing/flower game solution. They disapproved of that whole thing, and yet when it came out, did they do anything? Nope. They literally sat on their asses for months, they got rid of the dice games, and then the flower games started. Quite literally the same thing. Did they jump on it right then and squash the thing? Nope. Just waited till months and months and months while it all went on, until they finally got rid of it, when all the damage was done. Prevention, not reaction.
Still, it's not late by any means. It would take extreme measures, but the problem is quite solvable. In fact, at Runefest, in one of the sessions that was on the stream, J-Mods were asked to make suggestions which the audience would vote on. One of them suggested that partyhats become untradeable -- if you have any, you're stuck with them, and no one else can buy any. Another J-Mod suggested that they have a boss monster, which instead of dealing damage, actually sucks GP out of your inventory/money pouch/bank -- the ultimate money-sink of sorts. I think the money-sink boss monster was voted the best idea by the audience. I have never thought of or suggested any of these ideas, but it's instructive isn't it? Just about everyone acknowledges that inflation and the amount of money in the game is a horrific problem, and that something be done about it -- it's just that nothing is done about it....