Great comment! I'm similarly situated in life and know plenty of people my age who aren't so well situated. While my anecdotes tend to differ from yours in that I don't see a general lack of motivation, you've already handled that argument; perhaps I just know people who are highly driven rule-exceptions.

Having said that, I do believe there was a time in this country when going to college meant you were a motivated person who could expect a high likelihood of success finding a good job after graduating. This seems to be different now. More people go to college now, which could either represent an increase in the number of people who are motivated or a decrease in the proportion of people who go to college despite being unmotivated. A smaller proportion of college graduates are successful in finding a good job, which could either mean that it has changed in lock-step with the diminishing level of student motivation or that there are motivated students who now have more trouble finding good jobs.

My anecdotal sense of both of these things is that increasing college attendance is a sign of more young people being more motivated than ever rather than a sign of unmotivated people increasingly attending college, and that the market for good jobs for college graduates has lagged behind the number of motivated graduates competing for them. I think there was a time that people with humanities degrees from good schools were widely thought by businesses to be highly intelligent, hard-working, and imminently employable. Now I see people scoff at such degrees as the useless outcome of bad decision-making. Perhaps the new reality is that far more people need to be motivated to develop the passion and drive required to succeed in a business of their own making, but I personally think it's a shame that there seems to be far less room these days for people who just want to work hard for someone else.