I'm not sure what answer you're looking for. People are self-interested. And that doesn't stop when they work for the government or become elected officials. You occasionally get an elected official or government employee who not only doesn't take advantage of their position for themselves, but also won't just go along to get along. Those people are labeled as difficult to work with and they don't advance (or they don't get re-elected). For the most part, you have reasonably honest people who let their self interest influence their actions/decisions and are only kept in check by how much they can rationalize. That is what I think has happened with some of the welfare fraud. Some people are certainly just crooked, but some have seen how wasteful/harmful actual welfare spending has been, and you take that experience and then present them with an opportunity to spend that money on "investments" that will help the poor, and yea, so they get a few trips and/or private opportunities for themselves also, but they're just doing what they would do anyway, not actually doing anything different in exchange for those perqs.
The elected positions tend to be worse because those jobs are worth the most to the people that are willing to bend the rules the most.
SO the answer to your question is yes. Public Choice theory applies at all levels, whether elected, appointed, or hired, so you have varying levels of corruption from soft corruption (which is the most prevalent) to hard corruption (which is less prevalent, but certainly prevalent also). This stuff looks like it's on the firm side of soft corruption. There's no explicit payoffs, just lots of favors done, but with some "uncouth" comments that would have caused some politicians to back off earlier.