I live in los angeles and the proposed price is cheaper than taking a cab from the LAX to my place (4 miles). So no, this is not to help rich americans.
I think anyone who pays money to be transported from one place to another at high speed is too rich to be cared for by Bill Gates, from his perspective :)
There is a private bus service the runs between LA and SF for $40, which is probably less than the cab fare to the airport, or what a high speed rail ticket will end up costing.