Already asked and answered. You begin to bore me, so let me paraphrase:
1. Interns are not employees, they are students.
2. Internships are part-time, temporary educational training opportunities, not jobs.
3. Minimum wage is not "lots of money".
4. Hybrid situations like the one you IMAGINE do not exist.
5. There is tremendous flexibility in intern situations. Sometimes interns are volunteers, sometimes interns PAY for the privilege of OJT, sometimes interns receive degree credit, and sometimes interns are paid . . . but when they are, then the federal wage laws apply, as they do to any business.