Over a year and a half ago, a former staffer to Rep. Barney Frank, the then-chairman of the House Financial Services Committee, took a job with Goldman Sachs as the financial firm’s top lobbyist in Washington, D.C. The staffer had helped write legislation while he was working in the House of Representatives that would have direct consequences on his new employer.

Frank’s response, at the time, was admirable: He “instituted a permanent ban on committee staff communication with Peter Roberson, an aide who left the panel for K Street after playing a lead role in crafting derivatives legislation,” according to the Huffington Post.