Overpopulation is when too many populations disrupt the balance of the environment. Everything will be maintained if the population balance is in control. Population can be brought under control without any population decline through lifestyle changes. Demographics can be applied to a specific nation or the entire world if countries think carefully.
Anything extra in the world is harmful be it nectar. So we can get rid of it by applying a little awareness. As I have seen earlier my grandmother used to cook curry and when the amount of salt in the curry was high, she used to leave a few leaves of malabar spinach in the curry for some time. And after a while he would remove the leaves from the curry to reduce the saltiness a bit. Similarly when the population of a country increases if the people of the country can be converted into public resources then I believe that the problem of population growth can be solved.
You are correct. Population should be turned into a public resource because it can increase the profit of the government of that country such as providing employment for the able-bodied people outside the country and providing employment for the talented people in the country according to their merit. As a citizen of a country with a high population, it is the responsibility of the people living in that country to continue working to make themselves and their families financially independent by their own merits and not depending only on the will of the government.
Every poor country may have a disproportionately large population so the government of that country should provide additional financial support to its people so that the population can be gradually converted into public resources.
Yes it is an important solution by making the people of the country skilled by employing some part of them in productive work if they can be sent out of the country which is called export of public resources. Just as the government will play an effective role in making the country's population a public resource, if the people of the country cannot focus on educating themselves then the country will never develop. Therefore if the people of the country try to support themselves without relying on the government then the real development of the country will take place.