☝️🤓 Akshually there would be some correlation by sheer virtue of the US having the worst healthcare costs while also being one of the only "full" presidential systems in that category

Whether there's an actual relationship (which I'm guessing is what you meant) is less clear, but I think there's gotta be some association. There have been efforts to reform healthcare since Nixon's time, but they were always able to throw up their hands and abandon it due to nebulous partisan gridlock (of course, informed by moneyed interests trying to keep the govt from busting up their profits). With the more fluid governments and coalitions of parliaments it's possible we would have seen alignment on something