More money spent on government projects does not guarantee a proportionally greater benefit, and comes at the expense of other factors which are necessary for g

More money spent on government projects does not guarantee a proportionally greater benefit, and comes at the expense of other factors which are necessary for growth, such as private investment. Most of the things a healthy economy needs do not come from government and are not paid for via taxes. As a simple counter-example, let's say 100% of income were taxed and spent on the best educational and transportation systems money can buy. You'd have excellent schools and the best roads, but zero incentive for anyone to work, much less start a business. The capital needed to produce the goods people want would be consumed without replacement. That's a recipe for economic collapse, not growth.