Many progressives argue rights to property are arbitrary constructs of an elite and conservative legal system; that there is nothing “natural” or legitimate about them; and that, therefore, they have no special moral status.
Disagreements between libertarians and realists are a problem. But in the current interventionist-dominated environment, the disagreements don't strike me as an especially big problem — at least for now.
The socialist and anti-liberal movements we now face comes to use from intellectuals, aristocrats, and other elites. The "proletariat" has had no role in devising the movements we're told serve the interests of "the people."