Re: I've been pointing this out for years.
"it just requires... huge investments"
Yes, it does, infrastructure requires large and continuous investments, and if it's scrimped on, you get the US - poorly maintained roads and bridges are crumbling, internet infrastrcture is crap etc. You can't just one-off build infrastructure and leave it untouched.
I specified a 50-year timeframe exactly because I am aware of massive investment requirement