From a European perspective, I think that the establishment found it easier to implement the UN Agenda 21 under the banner of Social Democracy + alliances with Green parties.

As a result there is a general overlap between social democrat parties and the establishment, vs populist parties and anti-establishment movements.

This makes sense when we consider taxes, schooling, environmental policies, property rights, media control, moneyprinting in exchange for votes et cetera. These are all easier to achieve from a social democrat platform, even if there are authoritarian overlaps with the more extreme religious conservatives.