The Swiss method works because their population is 6X smaller and GDP per capita is twice as high. They have a smaller geographic footprint and heavier services economy. The UK still has so much industrial traffic (inclusive of agriculture) and a far less cohesive political environment. This isn’t to say that HS2 isn’t a train wreck (haha - it is) but applying small country policies to big country problems is a a bit…
What does the Swiss method (predicatable and consistent funding for the railway) have to do with population size and density? Germany has the same problem. The railway can't plan much ahead as funding is always at the political whims of the next government, prestigious mega projects get funded while existing infrastructure crumbles - and now you have another mega-project to remediate existing infrastructure over the…
In a bigger country, it is hard to maintain political cohesiveness over the long term. This means that big projects tend to get so large they can’t be terminated by the next round of government without major blowback. This leads to bloat and delay. The only way around this is total control (like China) but that leads to other issues.