How does government spending increase money??? Interesting. Yes the government prints the money but the only way I get the money is by earning it. Then coincidentally I give it right back to the government so they can give it to someone shall we say "less fortunate."
Great system I work for the "less fortunate" and to think all I want is a thank you once in a while. How greedy of me.
I'm far from the most economically literate here, but let me take a stab at this.
The only way you earn money is by getting a job or starting a business. In either case, your success depends on their being sufficient demand for your product or services. If there is little money circulating (much of it concentrated in the holdings of the very wealthy), there is a correspondingly low demand and small opportunity for advancement.
Government spending in the private sector (particularly by the direct means of providing employment) boosts the amount of circulating currency and the overall demand for goods and services, enabling you and others to earn that paycheck.
I welcome corrections from those better informed. And I won't even touch on taxes, since there has been some heated debate here recently about their exact purpose.