$100B per year for auto financing...

..needed to get sales out of depression level numbers and back into recession level numbers.  Yeah, let's print money to get people into new cars.  Nevermind the auto sales for the years prior were excessive.  Mean reversion is a bitch.  But if we can get people into cars then money will return to the economy, right?  If the government supports the auto industry (which they have) then it's in  their best interest to see GM sell more cars.  Ok, let's give GMAC a lot of money because then they can lend it to the buyers.  In the years to come we'll probably start to see the 'Buy American' campaign's.  It doesn't matter what you buy, follow the paper trail of those dollars and see where you end up.  From start to finish:

Fed Print -> Banks -> Consumer -> Banks -> Fed  -> Purchasers of our debt (the printed money)

If this is a round-about way of soaking up the excess liquidity then it's a disaster.