Conservatives are not opposed to deficits.
They just want to make sure they profit from them. And I don't mean this as a slam; liberals do the same thing, diverting deficit spending to their favorite social welfare programs. The question we should be asking is how much of tax cuts for the wealthy OR welfare spending is going to actually do the best job of stimulating the economy. Both may have some benefit, but there are probably better ways.
I say, infrastructure upgrades. We're going to have to do that anyway, no matter what, and not only does it release money into the economy, it also provides facilities, like roads and bridges, which will help generate future wealth. Of course, "tax relief" and "helping the poor" both sound so much better than "pork".