I grew up in the 1960s before there were helicopter parents, but I still think interns should be paid because I’m against slavery and because they may not be decision makers, but can still do legwork and clerical work that’s not worthless. I also think that successful people didn’t become successful all by themselves despite what they may think. They owe their communities, colleges, teachers, industries, specialties, companies for their successes, and as you mentioned, should pay it forward by helping others learn. I never attempt to wrack up slave labor for teaching. I teach because I was taught, and because I hate seeing untrained people make large, unnecessary messes.