"songs made up to make money are not political."

Can't see why that should be true - it depends on the songs, and how applicable they are to a political issue.

How about:
"Buddy can you spare a dime"

Or:
We don't want to fight,
But by Jingo if we do,
We've got the ships,
We've got the men,
And got the money too.
We've fought the Bear before,
And while we're Britons true,
The Russians shall not have Constantinople.

And it'd be easy to come up with more contemporary examples. (And I don't think it's too relevant or useful to go back over "what is folk?" yet again.)