They already tried that in 2002-2006. It didn’t work, and it won’t happen again.
Someone/somewhere has to pony up cash to float that instrument, and there aren’t people standing in line to buy MBS these days, regardless of bond ratings.
The party is over, the easy girls have all left.
It’s time to pay the piper. Lots of people are going to have a hangover in the morning, and their headache isn’t going away anytime soon, in fact it’s going to get worse.