The theory is that as the infra crumbles, it becomes unattractive and the affluent move elsewhere. Or, property taxes are raised to fix the roads- and the afflu

The theory is that as the infra crumbles, it becomes unattractive and the affluent move elsewhere. Or, property taxes are raised to fix the roads- and the affluent move elsewhere. Either way it starts a downward spiral of decreasing appeal & property value, and increasing cost. Which leads in to inexorable decay. People still live there, but it becomes a trap for the people who can't afford to get out. Strongtowns argues this fate was inevitable given certain initial conditions- subsidized infrastructure, underfunded maintenance liability, etc.