Right now, the government is busy rescuing the economy (read: banks), afterwards, they will turn to regulation. There are two sides to this:
(1) The government may find it best to REDUCE competition in the market to promote independence (e.g. no "shopping around" for ratings). This would be a highly favorable outcome for Moody's. The problem is, it doesn't look like punishment. The ratings agencies failed miserably in blocking the foolish financial behavior that got the US and world economies to this point. I don't know that the political will exists for this solution anymore.
(2) The government may do something radical. They may ban the issuer-pays model, forcing Moody's to return to the investor-pays model of the pre-70's period (note: they weren't growing anywhere near as much before 1980 or so). I find it hard to believe that ratings themselves would disappear, but (worst case scenario) the government may choose ban private debt ratings and instead to create a regulatory authority that rates debt -- sending Moody's and S&P to, effectively, zero (a low-probability worst-case scenario).
The question is, are you willing to risk the potential losses of outcome #2 in order to get the potential gains of outcome #1?