instead of reworking principle of mortgage why not convert 30 year loans to 60 year loans

I am completely against the reworking of mortage principal. People who made stupid decisions should be held accountable to it. why not 1) convert 30 year loans to 60 year loans ? 2) If principal has to be reduced then issue a certificate saying that the bank is eligible to 100% of the profits up to the amount reduced if the house is ever sold. the homeowner only gets profits after that.