When people give pep talks like this, there's an element of projection to it. This is likely what he tells himself.

He's talking to whistleblowers (people who can get the receipts) and citizen journalists.

He's also talking to everyone in the sense that he's describing an attitude and priorities that need to be culture-wide (American Culture).

Obviously not everyone is anywhere near the receipts and not really suitable to journalism, but that doesn't mean our expectations as a culture shouldn't reinforce this kind of thinking. See something, say something. Corruption is everywhere. It's not hard to call it out. Once called out the next step is to figure out solutions. Gotta call it out first though.