Umm, we just finished one and are wrapping up another. All it did was bleed the government budget of money and families of their servicemen.
Right...but it's the last one. I somehow doubt we can have the "world's greatest military" with only 10, 50, or 100 planes, however high tech they might be. I think it's money well spent, in this case at least. Could you have bought 2 or 3 more F16s? Yea, but it's been a few decades, an upgrade was in order.