Progressive Tax Structure
In this system, taxpayers making more money pay higher tax rates than those making less money (your example) .
The US uses this system.
He made the equation E=MC², when he was young, he was not paying attention in school.
Developing countries still may not have a fully literate population, or widespread internet access, a well functioning policing and fire services. Developed countries have all these things.
just a few examples, you can come up with hundreds
