He specifically said "earned or inherited"! It's certainly still possible to acquire FU money (about $1-$5 million depending on your standards of living and your investment risk tolerance) through an ordinary career -- although it's never been easy.
Also, and more respectfully, look at the effect of capital accumulation on wages. When productive capital (hint: not housing stock) increases, wages rise.
Also, and more respectfully, look at the effect of capital accumulation on wages. When productive capital (hint: not housing stock) increases, wages rise.