Any semilegal yet totally immoral clone army would have been provoked into being created by the continuing Dominion War in the Alpha Quadrant that the Federation was losing.
At the very least a feasibility study would have been warranted.
And if the Federation wouldn't do it themselves, how much of a shot in the foot would it be to hand over the technology to the Klingons or Romulans?
Nathan Hale said:
I regret that I have but one life to give.
Or maybe this is why Solok's baseball team looked like identical dodecatuplets?