Note that the remix/sample example hasn't always worked out as you state: https://en.wikipedia.org/wiki/Bitter_Sweet_Symphony#Credits_dispute https://en.wikipedia.org/wiki/My_Sweet_Lord#Copyright_infringement_suit

In many cases, "AFAIK" in your case you may have no idea that in fact, the copyright holder is being paid. Or the copyright holder is one and the same, with rights sometimes assigned to someone other than the musicians involved.