Elon Musk and Melinda French Gates.Marc Piasecki via Getty Images; Stefani Reynolds/AFP via Getty ImagesMelinda French Gates thinks the new generation of billionaire activists aren't doing enough.French Gates also called Elon Musk's criticism of her political endorsements "silly."French Gates says she will continue to give to organizations that support women's rights.Melinda French Gates says the new generation of billionaires, like Elon Musk and Peter Thiel, these days primarily use their "megaphones" instead of their bank accounts to effect change.In an interview with The New York Times, French Gates was asked what she thinks about the approach to philanthropy shown by the new generation of "billionaire activists" — like Tesla CEO Elon Musk, Twitter founder Jack Dorsey, hedge fund manager Bill Ackman, and PayPal founder Peter Thiel."Well, the people you just named have not been very philanthropic yet," French Gates replied.