tdgeek:
Well, something has to change. The benefit now is we have a real need to get workers working, whereas before it was purely political
A huge issue is now a lot of these mega projects don't actually suck up the same numbers of workers they used to, thanks to specialised equipment and heavy machinery. But we still need the productivity gains down the line and they'll cost too much if we dither on making a start (see: CRL).
So infrastructure is not the depression-busting job scheme it once was, even once the projects actually get started.