What is your prescription to address this?
It's not talking income, right? It's talking wealth. What people actually own. How much are the several hundred billionaires affecting that chart? How much does the "value" of Microsoft, or Facebook, or Berkeshire affect that chart. Gates didn't ever receive that as income, it was never taken from a poorer person, he just owned Microsoft, and its value increased, thus increasing his wealth. Same thing with me, frankly. I'm no billionaire, but my company is worth a 4 to 5 million. I don't have that money, but it surely counts to my net worth. I guess if you extrapolate that return through the years of my work, and add it to my salary, you could come up with a discrepancy between what I have, and what my employees make, but in terms of salary, I actually have employees who have higher ones than I do.
The top 1% is over 3 million people. That's a lot of people. Are we talking property confiscation? That video does not suggest a solution, but, realistically, actual property confiscation will have to take place to seriously affect that chart. Income tax won't dent it. Take all my income, I still have more "wealth" than all of my employees. To access it, however, I'll have to sell my company to someone wealthier. My employees then? Out of jobs.