Bread and Peace, a slogan made for a situation where people were literally starving en masse and watching a whole generation of their sons consumed by a war with no obvious benefit to them, is certainly tailor-made for modern countries where literal starvation is next to unheard of and (as per most European countries not named Ukraine) aren't involved in wars of any kind at the moment.
But is he literally claiming that the Left should use that as an actual slogan today? Or is it only meant to be illustrative of the argument that simple/clear messages are most effective in reaching out to the masses?