This is key. It's not that you're going to be third-world-country poor, it's that regardless of what you do, you won't experience the same economic benefits for

This is key. It's not that you're going to be third-world-country poor, it's that regardless of what you do, you won't experience the same economic benefits for the effort that you put in, compared to 30 years ago. This is true for people all across the board: blue-collar workers, office workers, and doctors.