Trump is doing that purge. The bureaucracy was becoming self sufficient and not beholden to the one elected person in the executive branch. It was becoming a self serving government and not democratic. We saw that in Trump's first term where the bureaucrats were being the 'resistance' and not following the President's agenda. If you really want to 'protect democracy' as Democrats keep ranting about, then you'd be all for having a federal government that actually does what the elected President tells them to do (within legal constraints). If you're all for an unelected bureaucracy that just keeps doing it's thing regardless of who the voters put in office, then you're not for protecting democracy.
This also comes down to differing ideology. Conservatives want small government. The government does the necessities, but always serves the people. Progressives are all about big government. A Progressive government is a large bureaucracy of 'experts' that make every decision and tell the populace how to live. Elected officials are nothing more than figureheads as it's the unlected 'experts' that are given control and make the decisions. It becomes a government where the people serve the government.
The past 80+ years, every Democrat administration has grown the bureaucracy and ceded more power to it. That bureaucracy has, for the most part, had a Progressive agenda. The status quo for when Republicans have been President has been to stall the bureaucracy's growth, but there's been little impact on taking power away from it. That's why there was such a fit when Trump and DOGE started shrinking the bureaucracy. A Republican finally started to try to dismantle the self serving ideological system. Trump was working to give power back to the people and allow the elected President to actually control policy without subterfuge within.