The extent of inequality in the US

[Franknburger]

The diagnosis is clear. But what can be the cure? Income tax increases might reduce the dynamics, but would leave the underlying pattern of wealth distribution untouched. Plus, you risk running into the Big Government scenario adressed by politico.

Wealth taxation and successive redistribution? We are not talking about land ownership anymore, this wealth is made up of bonds, shares, and derivatives. Highly mobile, and also so interlinked with the 'real economy' that you have to be careful to not kill the base of wealth generation altogether.
It is not as simple as the video graphics suggest - take some greenbacks from the big pile to the right and give it to the poor guys on the left. In practice, it would be more like transfering 0.0x% of Microsoft or Apple shares to each single mother. Interesting experiment, for sure, but I am unsure about the outcome. Would that really be a long-term redistribution of wealth, or just  a short-term cash-transfer, with all its consequences (stock exchange crash, inflation, better-fed children, etc.) ?

I don't have an answer yer.

[Franknburger]

Extremely high minimum wages, mandatory unionization of all jobs, 20- hour work weeks, confiscatory taxation,

Does not redistribute wealth, just income. And while income would probably become spread much more equally, i tend to believe that maybe 10% would have more, 20% a little less, 60% quite less and 10% much less than now. Not a very good deal.

.. elimination of imports from low-wage countries. 

Yeah, great! The reason the wages are so low in these countries is that people there have much more wealth than the average American, so they don't need wage income anymore. They just sit for fun at the sewing machine 10 hours a day. You're absolutely right, that is really the key to making the world a much better and fairer place.