Dear Scott (if I may).I’ve argued that the K-shaped economy — a term used to describe growing inequality between high- and low-income households — can be seen in sales of McDonald’s burgers, whose lower- and middle-income customers fell by double digits in the first quarter of 2025 as they struggled with affordability.Last Monday, you criticized me, arguing that McDonald’s problems are instead due to competition from rivals like Burger King. Tre…