I know this seems crazy, but if a country is willing to enforce a one-child-policy might they just turn their old folks into soylent green as well? It doesn't

I know this seems crazy, but if a country is willing to enforce a one-child-policy might they just turn their old folks into soylent green as well? It doesn't mesh with existing chinese culture, so I wouldn't expect this to happen in our lifetime, but it wouldn't be the first time malthusian government policy is deployed at large scale.