system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What are the sources of income for a country/government other than taxes?
gpt
The government can directly own resources that they sell (oil, lumber, food, diamonds, lithium, titanium, etc). 

The government can own factories or companies that make things that are sold. 

The government can sell debt as a secure form of investment, this is normally done in the form of treasury bonds that have set maturation dates and interest rates. 

The government can sell land to its citizen, or to other countries like the Louisiana Purchase. 

The government can sell services that it may have,  such as advisers to help write a constitution, or use of its military to protect a country that does not have a military of its own.