Some things are more important than money; national security and the rights of a people are two that spring to the top of my mind.
If we do NOT go into Iraq, loss of national prestige, spiraling oil prices, and increasing vulnerability to terrorism and WMD will make the economy tank and taxpayers won't be very happy about that situation, either.
We are in a "pay now, or pay more later" situation, thanks to Clinton's malfeasance. We must act now.
Then pay your own money for mercenaries. (And get some exemption from prosecution for it -- "letters of marque and reprisal," to note the Constitutional way of going about it -- by way of Congress.) Don't seize my money at IRS gunpoint.
As for "loss of national prestige," that is never a proper excuse for bloodletting. And as for supposed "increasing vulnerability to terrorism" if we do not invade, just wait to see what we're going to get a few days after our first strike goes in.