We get rich in the sense of consumption when money moves around.
The question in any economy is what balance between private and public is best at allocating capital.
With high taxes, the govt is trusted with allocating capital. With low taxes, corporations are trusted with allocating capital.
What usually happens is that Govt is a natural monopoly so they end up being ineffective at allocating capital to drive higher efficiencies. And if corporations have a mono/duo poly hold on market, they end up being effective.
The best $ spent by govt is:
- building common infrastructure to make goods and services move around faster, cheaper and safer. Then let corporations compete on what goods and services to move around based on demand and supply.
- enforce transparent pricing and certain safety bars are enforced.
- enforce competition in market with anti-trust.
- Create new players by injecting investment in new industries. China is really good at creating new industries (Solar, steel, infrastructure, cars, electronics)
Essentially govt collects tax to build a safe efficient competitive market. Ensure Corporations compete in that market.