Tax Cuts vs. Food Stamps

From Harper's Index:

Estimated amount by which the U.S. GDP increases for each additional dollar of tax cuts:
$1.03
Amount for each additional dollar of infrastructure spending and food stamps, respectively:
$1.59, $1.73

Are Republicans, supposedly the business minded and business friendly party, unaware of this fact? Maybe I don't have such a great business acumen but I have always thought a 73% or even a meagrer 59% return on investment is much better than a 3% return. But then again, the Republicans were at the helm when the economy went into the toilet, so what do they know.

What are we waiting for, Obama? Let's start feeding people and building bridges!!!