The difference being that those countries swallowed the cost and completed projects to full specification whereas the UK cuts back in the face of rising costs resulting in an inferior outcome that is not up to the job. Infrastructure in this country is woeful and has been so for decades, and it won't be improved by penny pinching.
Do you have any evidence that other countries complete projects without cutting back, to a greater extent than the UK?
I don't have any statistics either way, but I strongly suspect that you have no evidence for your assertion, and that in fact, the UK is not at all atypical in de-scoping projects that turn out to be more expensive than expected/it becomes harder than expected to raise the money. Certainly, I remember when I was in the US, transport projects far more modest than East-West rail seemed to be regularly being postponed/cut back. If you want a good example, look at the
BART San Jose extension, a very sensible project to extend the San Francisco/Bay Area metro rail into San Jose where it would connect Amtrak and Caltrain rail routes. Would have been completed long ago on the original plans. Instead, what is now being built is a shorter extension that terminates much less usefully on the outskirts of San Jose, without connecting to any other rail services (although plans are being worked on to get the line properly into San Jose).
As another example from the same part of the World, you might wonder what happened to Barack Obama's plans for a high speed San Francisco-Los Angeles rail route.
I really don't think there are any grounds for making out that the UK is unusual as far as what happens to major infrastructure projects is concerned.