There's always a problem in consulting companies of short foresight. They'd rather you make money right now doing billable work rather than spending money now that will save three times as much in the future. And if you think you're waiting for a good time to do process improvement, you'll never get there. There's never an ideal time. Either saving future money is a priority or it's not.
Mokalus of Borg
PS - Sometimes it's hard to figure out concrete return on investment numbers.
PPS - And sometimes even that doesn't help.