At least it would provide a source of power for the committees. They'd get more information on what it is they're voting on or be able to make suggestions as to how changes could be made.
I guess I'm of the view that right now you table the estimates by a certain time period and there's very little you can do after that. You have no clout really. A couple of times a committee has held back some funds or proposed to hold back some funds and a resolution was obtained before a final vote on the estimates, but that's very seldom.