“We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.”
This is the purpose of the Constitution, not the Federal government.
Exit taxes when renouncing US Citizenship: taxes are due if:
- Your average annual net income tax liability for the past five years, preceding the renunciation is more than $162,000
- Your net worth is $2 million or more on the date of your expatriation
- You failed to certify that you have complied with all of your federal tax obligations for the past five years preceding the expatriation
https://1040abroad.com/faq/renouncing-u-s-citizenship/
https://www.va.gov/opa/pressrel/pressrelease.cfm?id=4049
http://www.governing.com/gov-institute/funkhouser/gov-government-purpose-capitalism.html