To structurally reduce the fraction of GDP devoted to healthcare, we need to make far bigger changes. A lot of the setup right now is to subsidize those on Medicare by those on private insurance programs. The cross-subsidization goes very deep, and anything that might reduce costs also has the risk of undoing cross-subsidization. With half the country refusing to reform health care for the past 30 years, and the other half having their hands tied behind their back on trying to improve health care, we have built a gigantic overly complex system that's very hard to unwind.
It can, at least to some degree. Every doctor's office has people who run through the insurance maze, trying to get services paid for. And every insurance company has people on the other side, trying to find ways to not pay for stuff. Having only one organization to deal with would simplify that; having one organization with clear, transparent rules would simplify it more.
From an European perspective, the entire purpose of NATO from 1992 to 2022 was to prevent wasting too much money on defense. Because, for some reason, Americans were willing to do it instead.
Then Russia invaded Ukraine, and the calculus changed. Now European countries are rebuilding their defensive capabilities, while Russia is still bogged down in Ukraine. Given the lack of credible short-term threats, limiting defense spending was clearly the right choice until 2022.