The powerful and the wealthy argue that increasing population is good for the economy.
But while, the larger the population, the greater the power in being leader of the population, if anything this leads to less individual wealth and happiness. Countries are a finite size with finite resources. More people means, on average, a smaller share each. Of course, everyone’s share isn’t equal, and those with enough wealth, can still even grow their share, leaving less for everyone else.
It is not just politicians who benefit at the expense of the masses, as the larger the population, the greater the wealth of the most wealthy, and the more revenue to monopolies and the largest businesses on the stock indices.