I think you’ve a good point on workers. The contract/hourly worker perspective on popular startups is not often discussed in the tech blogosphere. The more that workers are removed from the consumer’s view, plus the more we see winner-takes-all markets and set labor prices, the more labor concerns there will be.
I think it’s a cycle in the labor market: new companies get broad support in circumventing traditional labor regulations because they’ve an innovative new product and seem to treat everyone well, then things change over time as startups become incumbents who want to reduce costs everywhere they can and we remember why labor regulations were put in place.
I’ve a half-written post on whether marketplace startups increase or decrease income inequality. Your comment is a good kick to finish it. Will be curious what you think.