Very good point. I'm 30, check reddit/instagram/FB more than I ever did in college, yet I'm more more disciplined during my work and study than I was in college.
50 years ago it was different. You could work some grocery job and still be okay. Nowadays working minimum wage means being left behind and poverty. Given how competitive world has become it's only natural that it came to that.
50 years ago you would compete with your surroundings, now you compete with the whole city, country or even world in some cases. And this applies to everything: work, relationships, sex life, etc.