Nobody owes Jack a living but, at least in the way jack tells it, MK was basically his best buddy for a while, got his hopes up by saying they would continue to work together professionally, and then "ghosted" him, to use modern parlance. And that was a pretty shitty thing to do.
Although to be fair to MK, and Jack doesn't say this in his latest podcast, presumably for dramatic effect, MK did in fact invite Jack back to play what was probably the biggest gig DS ever did, the Mandela show. Jack couldn't make it, for absolutely the right reasons, but even then MK gave Jack a shout out in front of an audience of billions or whatever!
So two sides to the story I guess...