COVID AND THE VACCINE - TRUTH, LIES, AND MISCONCEPTIONS REVEALED, page-1823

China's population growth is starting slow and will continue to slow India will be the same in a few years.
The cull as you put it is just more conspiracy theory without foundation.
What size population should we have I don't know for the rest of the world but for me small is beautiful and the lock down we have had in Australia has shown we did not have the huge rise in unemployment that many predicted and controlling the virus has been more successful than many other countries.