Is money the only/the biggest motivation for working hard or taking a long education? What about personal interest/fulfillment + respect from others - don't these things count?
I don't think money is the only motivation for taking a long education, and do some hard work. But I think it's the biggest.
Most people wouldn't take the trouble to get long educated, if they wouldn't get more money out of it, than if they just got a job.
Of course you get some respect from others if you take a long education, and respect from others does count. But there's more ways of getting people's respect than taking a long education. It has also a lot to do with you as a person.
Most people wouldn't take the time to get a long education, if they would get the same pay as a person with no education.
I think most people would prefer to spend more time with their families and friends, than studying. Especially if they knew they wouldn't get more money in the end.