Why have a credit rating at all? Let's just print infinite money so everyone can buy a house, a Ferrari, etc.
Technically, the federal reserve is in fact printing "infinite money", it is just going to the banks rather then the people.
When a currency is backed by nothing more then a promise, then you can print as much of it as you want.
As for the opening post, looks like we are getting on a wave of recovery, crash, recovery, crash,,,,,.
The housing market should not be a key factor in an economic recovery. By using the housing market as a factor in job creation, the nation is not increasing its wealth.
We need factories, shipyards, steel mills,,,, that is what creates wealth in a nation.