So, Lawrence Jefferson the traitor in Heirs of Empire, did quite a lot of things that would have entailed spending large amounts of money. As a couple of examples, there was the money that he used to bribe the maker of the graviton bomb, the bribe money for the mat trans operator. And the grav bomb maker said (to us readers) that money had been no object. And what about the large amount of money it would take to build and staff the duplicate mat trans? And there are other things that would need to be paid for.
He was a former US senator, and then the Lt Governor of earth. I think that there may have been a mention that he had family money, but I find it hard to believe that that could have financed all of the many things that required untraceable funds to pay for those things.