A surprising number of people answer this question: yes. Or never really thought of it before.
Not really a realistic question. If the US Govt didn't exist, society as we know it, the workforce, education, etc, would be completely different so there's NO way to know what jobs would a or would not be available or what kind of education and/or training you would have received before joining the work force. Not to mention l as what opportunities might be available for self employment.