Earlier quoted context omitted.
“Basically the same bridge” is such a hilarious oversimplification that it makes your blame of the Federal Reserve even more amusing. No, absolutely no improvements in engineering, materials, process, or design in sixty years. No added overhead for environmental studies and other regulations. It’s all the Fed. Hacker News discussing economics is like arguing geopolitics with someone on peyote.
The thing is that "improvements in engineering, materials, process, or design" should make it cheaper, not more expensive. That's how it works in other industries. Although I don't think it's fair to put all the blame on the Fed. The same thing has happened in the UK and many other places.
Only if you’re optimizing for cost, which public infrastructure very obviously isn’t. It’s optimizing for safety.