One of the big reason we have an increase in wealth inequality is globalization. Before 2000, you were only competing with another American at the same wage. Now, you need to compete with workers in India, China, and Mexico. If not in those countries, big companies like Facebook will just bring them over on an H1B visa at a similarly competitive wage. It's the same phenomenon that happened when technology uprooted th…
...What??? If google was as good as some people claim, we should be able to look up something like U.S. automobile imports from 1950 through 2015. Also, NAFTA became law in 1994, and I'd argue that this is a lagging indicator more than a leading one. The culture at large (or at least the politically influential part) had to accept this first, before it became law.