How do I get people to actually live near their workplace

I’m a relatively new player & have started drilling into the detail about my citizens, and found that huge numbers of them live on totally different islands to their workplace. I’ve got plenty of vacant housing in the correct wealth bracket closer to their workplace, with better leisure nearby, but they don’t want to move.

I’m assuming this is an issue, because they’ll spend longer travelling, but how do I actually resolve this?