So of we just keep people poor... issue solved. Like someone in Africa or North Korea, they are not going to need more resources than what can be regenerated. Simply because they lack the means to do so.
If we assume a communism with the same level of technology, comfort, ... how would we avoid the exact same issue? Why would people suddenly not drive their own car mostly alone? Heat their homes in winter, causing a big portion of global CO2 emissions by doing so?