The Trump campaign stridently postured as "populist" and "nationalist". but when it came to actually taking office, Establishment donors paid for the transition team. No wonder the presidential personnel operation at the transition was an Establishment op. People who know Washington know that "personnel is policy". So Establishment money into the transition resulted in Establishment types filling the new Administration. Many authentic populist-nationalists who worked in the campaign were filtered out by the transition presidential personnel office. For some insight into the billionaire and corporate donors, take a look at this analysis by The Center for Public Integrity,
"....The nonprofit formed to handle President Donald Trump’s transition raised about $6.5 million in private contributions, fueled in part by corporate interests, billionaires and lobbyists, according to a Center for Public Integrity analysis of a new federal filing....."