'White Lotus' star Jason Isaacs reflected on managing money 'immaturely.' A financial planner breaks down how to avoid doing the same

Jason Isaacs in "The White Lotus." HBO Jason Isaacs said he's spent "pretty much everything" he's earned as a TV and movie star. Isaacs said he "immaturely" matched his spending and income, so he hasn't saved as expected. A financial planner told Business Insider how to avoid lifestyle creep. For…