No, Trump etc are not the establishment. They are effectively a foreign invader that the immune system of the establishment wants to evict. But we've reached cordyceps levels of infection at this point.
If you want to see the establishment's viewpoints, read the NY Times (the news articles, and analysis, but not the op-eds).
the GOP has been pulling for this since the HW Bush era.
dismantling the Dept of Education, reducing spending across all areas, reducing government involvement in healthcare -- take a look at the Fortune 100 list and see how many healthcare companies are in the top ranks -- have been top priorities for decades.
they're just saying the quiet part loud now, and acting on it.
If you want to see the establishment's viewpoints, read the NY Times (the news articles, and analysis, but not the op-eds).