Easy.
Hillary's plan isn't tax cuts. Tax cuts allow people to keep more of their own money, and spend and invest it as they see fit, rather than spending it or "investing" it as the government sees fit.
Hillary's "stimulus" program is simply more alms from the State, increasing dependency on government and the power of those who run it.
Almost by definition, such government "investment" money is pumped into things the private investor or buyer wouldn't touch with a ten foot pole, or the money would be going there anyway. People don't have to be forced to invest in good ideas.