Cryogenic Suspension in Return for Organs

I think a logical incentive for organ donation is that one's head be cryogenically preserved and a guarantee given that the donor will be revived when (and if) the technology becomes viable. This system doesn't have some of the moral concerns of cash payments and the demand for organs is so high and the supply so low that it should be very cost effective. Even if it became so popular that supplies of organs were to somehow become plentiful (a doubtful prospect owing to the low utility of older organs or those of sick donors), cryogenics is a technology that could benefit enormously from the economies of scale that would be created from widespread use, lowering its cost substantially. Additionally, as only heads would be preserved, a smaller amount of resources would be required than for an entire body.