But it sure seems to me that a phone book from 1937 could generate a lot of people to give $150 each. The campaign has accounting, with names and addresses, but the list is not widely reported, so who would ever do an audit? It would all look fine until you started digging, and I don't think anyone would ever dig.
What's much more likely is something like the Hsu scandal, where a major donor gives money to surrogates to contribute in their names. That's illegal, but the campaign itself isn't doing anything illegal and they can deny any knowledge (assuming they had any to begin with).