We have a right to own an excess of land only if there are no poor people

We have no right to own an excess of land if others are landless.

For property rights to be justified they must be pragmatic for the group, as property rights are concerned with the welfare of the group. If some people have no land, then clearly it is best for the group that they should be able to get land, since we assume the people are not criminal and in prison. If it is pragmatic for the poor to get land, then it must too be pragmatic for the rich to give up their land and anything else violates pragmatism and is not justified.

The poor have a right to demand that the rich give away a portion of their land, and that land wealth is capped. If there are poor people, without land then we have no right to own an excess of land. We only have a right to own an excess of land if there are no people who have no land of their own. If there are poor people we have no right to an excess of land.