Why would they need to? Population is only a problem under capitalism because it creates artificial scarcity and poverty which leads to much of the conditions which people blame on overpopulation.
Many population ecologists agree that the earth, under similar conditions to today, can sustain between 9-10 billion people. Not to mention that the rate of replacement (the number of children people need to have to maintain a steady population) is reducing steadily across most of the planet.
It gets even more absurd when you consider that we already produce enough food to feed the entire population, and we haven’t even began to put into practice the hundreds of more effective farming methods that are only being held back because they’re not profitable for the capitalist class. Or that the entire world’s population could live in an area the size of Texas, and still be granted enough room for a four bedroom house and a small garden.
The issue isn’t overpopulation, it’s overproduction. We produce far too much while millions of people starve because our economic system creates an artificial scarcity to drive up prices and limits access to food based on income.