Rangel was also buying goodwill from other politicians. And it seems it worked, up till now. Really still is; he got his hand slapped, and that's it; we'll see if these clowns decide they should start acting like they actually care about ethics and all that crap.
Or, in the case of Pelosi for instance, pretending she cares about ethics; she's helped- insisted on- keeping his corrupt ass in that position for a long time, but he's just getting too much press now(wonder if Gore foresaw things like this when he invented the innertubes?) for her to keep insisting, no matter how much help he is.