A testament to success: when you can name your own price.

or jagger didn't care

From snippets I've read I have the impression Jagger was deeply involved in managing the band's finances, and damn good at it. I recall an interview with a musician who talked about negotiating how much he'd get paid for playing with the Stones on a tour (it wasn't very much). Jagger may have written "please write back saying how much money you would like", but notice that he didn't promise they'd pay it!

Yes, I somehow doubt Jagger expected to personally foot the bill.