The money comes from her husband, Richard Blum. Blum was the head of Blum Capital Group and URS, which does a lot of defense work. Blum Capital is very similar to the Carlyle Group, and in fact has done a lot of business with them, including buying subsidiary companies from Carlyle.
Yeah, I knew they weren't really living on her salary.
And her husband manages the investment monies for the CA public workers and teachers unions. Which, in turn, fund the DNC in money and votes.