I would actually disagree that the economy is broken- it's just new. I don't really think there is enough currency, both pebbles and MS/shards, floating around right now to make any calls about whether it's bad or not. You can't compare a less-than-one-month old economy to a nearly 10 year old one; FR has hundreds of thousands (millions?) of premium currency in play, and several times more of the free. Obviously that much wasn't bought/generated at once, but rather over a decade. As time passes and more pebbles/MS are introduced into the economy we will be able to see if things need adjusting. Remember when everyone was freaking out about how wolves are so unaffordable no one can play the site? That just needed time to fix, because a new site doesn't have much supply (be it wolves or currency) and demand is also very unusual (e.g. you aren't really selective of what your first several wolves look like, you just need more- as wolves become easier to get you become more selective as lack of space becomes the more pressing issue).
The reasons MS are so hard to get right now is because everyone is just starting out, everyone is trying to gene up, everyone is trying to expand. Several months (let alone several years) down the line that won't be the case, AND there will be more currency to go around. I just don't think it's wise to make huge economic decisions right now.
(I do think at least the first profession expansions should for pebbles though)