In my 62 years in the United States, I have never seen so many Help Wanted signs in stores, gas stations & restaurants.
From 16 to 18 add pumping gas, and restaurant kitchen work.
All thru college, waiting tables, tending bar, and cooking line in restaurants.
Then right to full time job after college, married the following October. My kids all the approximate same progression and work ethic. Last one graduated a semester early with a full time job in software engineering in the company's London, England division.
Work ethic is a trait from home.