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.
No when enough wealth is created at the top, the people at the top want to generate yet more wealth as appetite for wealth is never satisfied, so they trickle down some of that wealth mostly as a means to create more wealth for themselves, which pushes the standards of living up. They create schools and educate the masses, to train them as employees that can do more complicated things so that they can sell those things to other people for more profit. Competition between the rich is what pushes everyone up.
This sounds border-line conspiracy-theory-ish, but think about this the next time you hear wealthy or powerful people talking about how to improve education. They might not talk about how education opens your mind, expands your horizons, liberates you from poverty, etc. (some do, and those people are awesome). They may instead talk about educating people to prepare them for specific jobs. That sounds great as a direct impact of education, but that's a hint that they're really looking for publicly-subsidized training of their future employees so they can get away with not providing the training or necessary financial incentives themselves.
There is so much wrong in so few sentences that I literally unable to untangle it. Further discussion seems pretty useless in this case. I hope you will find some good economics books that can get you out of this tangle.
All those poor immigrants that came to the US, when the US had 2% of GDP in Federal government spending, did they all stay poor?
There is a discussion about poor people and opportunity, but your statement is just plain false. Its false both empirically and theoretically.