The problem is the corporate centrists would and often do ally with the Unrepentant Nazis when the owners bribe them both and give them their marching orders on economic policy.
The supposed "voice of sanity" corporate centrists would literally rather have Nazi Germany than universal healthcare or a UBI. It's a better outcome for corporate profitability.
Neoliberals dislike Republicans, but both they and Republicans loathe leftists/progressives. Probably because neoliberals and Republicans have had a quiet agreement since Reagan to bicker on social issues but do what they're bribed to do on economic policy, while progressives understand our current, rigged economic structure to be the root cause of most of our many crises.
Neolibs and Repubs just want to play fight about social wedges while they drink from that unlimited gravy train plugged directly into their PACs. They both consider it their higher duty to undermine any economic extremists trying to legislate a more equitable society. That's the opposite of what the owners that pay any willing federal Democrat or Republican to play ball want.