Nobody wants US healthcare, not even the US; to willingly introduce it here would be instant political suicide. That gives me hope.
And Conservatives have screwed things so hard in the past 12 years, I think there's genuine appetite for public investment. The current Labour party isn't the government it very nearly could have been in 2017 but if their recently energy policy[1] is anything to go by, they're not afraid of borrowing to invest in long term savings.
Energy is a great example. If we could become independent of oil and not just swap that for lithium/cobalt dependencies, that probably is worth the outlay. Healthcare falls into a similar bracket.
The added bonus is that if Labour gets a PR-like voting system implemented, it might be harder for any one (or two) parties to dominate politics and we could focus on goal-orientated politics. Maybe.
1: https://www.theguardian.com/politics/2022/sep/27/labour-will...