"If the beancounters can get something done by a certain date, why can't the IT monkeys?"
One of the things that the beancounters get done by a certain date is to outsource the IT monkeys who had their calendars sorted. And when the IT monkeys get outsourced are they really going to tell the beancounters "by the way, you need to keep an eye on this."? At some point beancounters get to discover that the IT people they outsourced weren't monkeys but there's a distinct possibility the outsourcers were - or maybe they were snake-oil salesman.