So, in the forum where they talk about releasing housing stuff, they talk about imagineture,(sorry if thats the wrong thing, trying to remember) as money to upgrade your house. Now I do know that not many people are level 60 yet, but as a bonus for being 60, what if when you gained xp, it turned in to the currency used for housing, so though lvl 60 people don't get more exp, they get bonus to housing currency when they get exp. Also, I am suggesting this as something lvl 60 players can do, because i have not seen talk of increasing level.