Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

Relative worth of investment versus spending for the economy 
I believe you're looking for some sort of formula that will determine how changes in savings, investing, and spending will affect economic growth.  If such a formula existed (and worked) then central planning would work since a couple of people could pull some levers to encourage more savings, or more investing, or more spending - depending on what was needed at that particular time.  Unfortunately, no magic formula exists and so no person has enough knowledge to determine what the proper amount of savings, investing, or spending should be at a given time. I found this resource particular helpful in describing the interactions between savings, consumption, and investing.