Social and economic wellbeing of all labourers! Afgordable housing, groceries, and a clean home, with equal labour rights for all so there's no incentive to mass hire immigrants.

(The last one isn't necessarily part of my thought, but it might get people on board who otherwise vote on right-wing parties, solely because of the immigration thingy.)

The narrative must be focused on the economy. None of that cultural warfare nonsense, all on the economics.