We all know that roads aren't free. If they weren't worth building in terms of increased economic output, however, then city planners would stop building them.
That seems reasonable on its face. The reality is that state and federal funding hinges on city planners padding budgets and increasing capacity to meet future growth. Meanwhile, cities and towns put themselves in hock to meet the servicing demands of their infrastructure, requiring more state and federal funding, requiring new projects with padded budgets and increased capacity.
Notice that nowhere in there was a requirement that said infrastructure pays for itself. More often than not, and especially in small towns, it doesn't.
So I open another stall next to it but the lines don't seem to get much shorter even though I'm making twice as much coffee.