If we ignore the fact that we have high unemployment, we still need to repair our infrastructure, upgrade education, modernize airports, upgrade the internet, drill for oil, find alternative sources of energy.and more. We need to do these things for our "general welfare".
We need to invest in the above for our future. The question is do we do it now or later. It seems to me we do it now. Interest rates are low and our workforce is underutilized.
What are we waiting for?