Perhaps there can be a compromise for people who think there should be no trading between accounts and those that think there should. Maybe a tax system of 20% (adjustable) could be implemented so people will think twice of simply transferring money? Even a max amount of money transferrable per day could be implemented...
Edit: While I'm at it, I still think the multiplier is hardly a way to reward people due to it punishing an evenly matched game in favor of a one sided domination. There are a number of other factors why I dislike it (such as autobalance hardly creating a cohesive team). Basically it's too random.
Should really reward round wins, not successive round wins. (Perhaps a 3x multiplier of the xp and gold for next round only, then drops to 1x after a single win)