There are different mechanisms involved. Wealth inequality in general is caused by cheap credit which drives up asset prices. Facebook and Google are not tech

There are different mechanisms involved. Wealth inequality in general is caused by cheap credit which drives up asset prices. Facebook and Google are not tech companies. The own all the best advertising real-estate. Amazon owns all the best store-front real-estate. And so on. There is no limit to how much of the relevant real-estate these can companies can own. Therefore exponential distribution of valuations. "Tech" is not a big part of it. For example, there is no way of competing with these companies based on tech. Hm. What about taxation of domain names based on revenue?