President of an electric car company advocates a higher tax on gasoline

Isn't this obviously self serving?  So does anybody believe that these environmental firms aren't pushing for public policy that increase their profits?  From The Hill newspaper:

Tesla Automotive CEO and co-founder Elon Musk said climate advocates need to “reframe” the argument on climate science. . . .
Musk also said he had a solution — albeit one Republicans have outright rejected — for reducing carbon emissions.
“The thing they’ve got to do is try to put a tax on carbon,” he said, inducing cheers. . . .