You need to introduce the 4 sectors of American Economic system ie 1. the Household, 2 Government sector, 3, the Business, and 4. the Global
Every Economic activity begins with the Household sector as the Household is made up of people, consumers, and producers of goods and services, people who become politicians and work for the government, the business, and international/global sectors.
The Government collects taxes from the people and uses such money in providing health, safety, serve and protect us from within and outside.
The Business sector recruits people from the Household as employees for the production of goods services, pays them their salaries, they in turn use such salaries as consumers to buy goods and services from the business sector.
The Household also sends people through the Government to serve in the Global sector as employees to serve and protect the people.
Note that all 4 sectors pay and receive taxes in different forms to the central government to which these are distributed to smaller governments such as the states, counties, and cities.