The argument resolves around the "longer-term trend toward income and wealth inequality". There is nothing however to directly link this to technological innovation. In fact I believe it is government policy which is increasing inequality rather than technology. In the UK for example, we have been seeing some clear cases of policies which have (either deliberately or inadvertently) transferred wealth from the state (i.e. the population as a whole) to the elite (i.e. the rich), e.g. the privatisation of the Royal Mail.