People who have been dead for 20 years still occupy the land, and it is a waste of resources to have more people alive.

The explanation for wasting resources when more people are alive is as follows:

Fundamentally speaking, it is because China implements the household contract responsibility system, that is to say, the contracted land is contracted by a family, and the land will not be recovered because of the death of a family member, nor will it be increased because of the increase of a family member, which explains why "increasing people does not increase land, and reducing people does not reduce land".