The government gets its funds via taxation and borrowing. However, you are setting yourself up with a "no true scottsman" fallacy. We can then take your statement to the private sector, arguing, "where do businesses get their money?" fully assuming that only people, the citizenry only create wealth.
Assume a business that is facing a zero growth outlook for the the year. If they were to borrow money to invest in efficiency driven capital, where did that money come from? We know it is borrowed :mrgreen: However, they will then be able to implement the "tools" to increase profit in the long run and grow (assuming capital depreciation is kept to a minimal).
BTW, it was too small APDST, and not centered enough on creating infrastructure. How could you disagree that $10 trillion in infrastructure spending would not generate job growth? That does not make any sense.... The new Cowboys stadium was done privately and cost a little over a billion dollars. Imagine if only 1,000 spending projects such as that (but not necessarily stadiums) were implemented within the span of three years. You have jobs, spending circulating, and new facilities/roads/bridges/infrastructure in which the "businesses " -- the citizens who create wealth -- will be more efficient because of.