Kudos to that article for apparently writing with the general public as the target audience, but still using proper technical terminology (including thalwag, one of my favorites).

But an emerging principle in infrastructure design is that demand grows to saturate supply, and that's not usually sustainable.

This is true for traffic on the interstate (people avoiding rush hour traffic, until a lane is added) or for water availability (the existence of Las Vegas).

Engineers are uncomfortable with the concept, as it tends to veer into public policy. In the case of flood risk management, us policy is catching up with engineering, and FEMA has been offering block grants for relocation of flood prone communities for some time now.

Sometimes the right answer is to help people move to an area that can sustain them.