Amazing. What a lovely deflection to brush away your pointless arguments. Make counter-points that make no sense or contain no relevance whatsoever and then simply brush them away with "you started talking about that" path. Great. I'll take that as an admission of pointlessness of your interjection. What you consider so extreme is common place in many wealthy European nations.
You yourself posted earlier from Sanders' website that there is a 20% cap on this. So, no, property is not eroded. When an employee leaves it doesn't change that 20%. You don't get your 0.000001% and leave the remaining 19.999999% to become the new 20%. That cap remains the same. A company pays dividends if shareholders decide to get their share of the profits of a company. They could choose not to do that and keep investing that money in the company indefinitely. If the CEO of the company wants to get a big cut from the profits while paying the workers minimum wage they get to share a bit of that profit with the workers as well. We're talking about sharing profits, not the revenues. If there is no profit a company can not pay dividends. You're talking about shareholders wanting to screw the employees just because of greed and deciding to take the dividends the workers would receive from their wages and other benefits. That's not a valid argument. Hence, you're clearly missing the point.
So, you'll just ignore my requests for you to expand on your claim that Sanders is not a communist? Strange...
No, there is no problem with the constitution. If you read Sanders' proposal the idea is to transfer stock by issuing new ones.