That has never worked before. Incidentally, Ralph Merkle contributed an appendix discussing the endowment and saying something to the effect that rich people will not donate (more than they are already doing so which has kept Alcor afloat these past decades) because they see little return on their donation and that Alcor is not fiscally responsible, but follow his views on not dipping into the endowment and maybe then they will come to trust Alcor more with their money.
What prevents the organization of X number of rich donors, who spend some of their time and money soliciting pledges from other donors for an Alcor endowment, that Alcor only ever sees if it signs a contract to spend the donation on a endowment and nothing else?
One of the sticking points for cryonics is how expensive it is. Unfortunately, the estimates on LW (eg. in Normal Cryonics) are likely to be low as they are current costs. This is starting to come to a head for Alcor, with Alcor's low growth rate meaning it faces a rising tide of aging members (hence that emphasis on young cryonicists) and fundamental flaws in its prices; the official word has come down in the latest issue of Cryonics, issue 2011 q4:
Cryopreservation Funding and Inflation: The need for Action; A Discussion Article by the Management and Board of Directors of Alcor
What to do?
Hope the old grandfathered members like Mike Darwin (who predicted this, in the February and March 1988 issues of Cryonics) can afford that.
On a parting note, I read somewhere that CI's low prices have rarely risen. I wonder what their projections look like...