Drum finds another.

Short version:

All former Presidents get an annual stipend from the government to use for ex-Presidentish things like employing staff, giving public speeches, attending funerals, etc.. And Bill Clinton gets his stipend, just like all the others. Bill Clinton also has the Clinton Foundation, which makes demands on his time. He also participates in his wife's campaign. Busy guy.

So instead of employing multiple sets of people to handle the different things he does (one for ex-Presidentish stuff and one for Foundation stuff and one for Hillary Clinton campaign stuff), he does what any sane business would do: he has one staff and he pays them out of whatever pot of money their tasks specifically relate to.

Also, it's perfectly legal.

But this is a big deal for Politico, because it's Bill Clinton. And everything a Clinton does is automatically under suspicion.