Let's not talk past one another.
We are moving toward a situation in which one party is highly skeptical of technological growth and favors regulation of tech companies, while the other takes a more lax approach. Further, this issue will utterly dominate all other issues---particularly the issues that you are focusing on. The era of our voters giving a crap about the highest marginal income tax rates is coming to an end.
The young, influential Trump supporter who penned the Breitbart op-ed piece is attacking legacy Republicans for refusing to consider regulating the tech companies. He is calling for regulation of monopolies more generally. The old Republicans in the Senate won't stand for it.
Yesterday's primaries couldn't have been better for the Trumpists. Renacci, Braun and Morrisey all won. Assuming some of these candidates win in the Fall (they will): in the short-term, the Republicans will get harsher on illegal immigration and unequal trade practices.
At the end of Trump's second term, expect the Republican party to be significantly more Bannonist in ideology than today. That means: harder on illegal immigration, less multilateral trade agreements and more tough bilateral agreements with countries using "unfair practices", more federal infrastructure spending than they are currently calling for, more regulation of tech companies than they are currently calling for. The main exception will be on marginal tax rates for the wealthy (Bannon advocates raising them to pay for middle class cuts), which will be an issue that most voters don't really care about.
My key predictions are:
(1) In 15 years, either the Ds or the Rs will be strongly pro-technology and will support limited regulation of tech companies, while the other party will be highly skeptical of technology.
(2) This will be the most-discussed of all political issues (for example, at the presidential debates).
(3) In 40 years, if the United States still exists, no other issue will even be discussed.
At the 15-year mark, as I see it (this part is less certain), Bannonism will be aligned with the skeptical-of-technology side. However, it is possible that a further reconfiguration will occur, creating odd pairings (e.g., more regulation of tech but lax on the border).