In short there's no actual will and people think short term. A bit longer: Good luck sourcing that from taxes. People vote, and those projects would A, fall t

In short there's no actual will and people think short term. A bit longer: Good luck sourcing that from taxes. People vote, and those projects would A, fall to graft, B piss off many in your voter base both as a consequence of the graft and the general disagreement over their value. The answer is you would see the people who greenlit the projects voted out and the projects would be scuttled. People can say they know this is a problem but because its in the abstract most of your voter base just won't go for it and it's squarely in a "people don't actually vote in their best interest" type of problem. It's a riot trying to get a few new MTA tunnels approved and needed repair and modernization for the NYC subways is always basically just out of the question. So 50 ft sea walls? Yeah people would actually be under water and still doubting the need for them.