Perhaps, but I think my point stands. CEV will use a veil of ignorance, or it won't be coherent. It may be incoherent with the veil as well, but I doubt it. Real human beings look after number one much more than they'd ever care to admit, and won't take stupid risks when choosing under the veil.

One very intriguing thought about an AI is that it could make the Rawlsian choice a real one. Create a simulated society to the choosers' preferences, and then beam them in at random...