system
Given the following post, respond as if you're commenting on Reddit:
human
[The Expanse] How is Mars able to stand any sort of chance against Earth?

Earth has several billions of people, and the economy that comes with that. I don’t know what the population of Mars is, but if they have to live in habitats, it can’t come close to Earth’s. There just isn’t enough collective physical and mental manpower on Mars to keep up with Earth both logistically and technologically.
gpt
Earth has a population of 30 billion, however most of the population lives on "basic" assistance, essentially struggling below the poverty line.

Mars has a population of 9 billion and their entire culture is near militarized towards their goal of terraforming the planet - they look upon the people of Earth as weak, suckling off of basic and living weak and papered lives compared to the struggle they endure. 

Earth actually lags behind Mars technologically, in the early days all the best scientists, industrialists and entrepreneurs went to Mars. Earth has more ships, but they're older and far less advanced, case in point, a state of the art Martian Corvette was able to cripple an Earth Battleship.

But dem dusters and dirters down da well got noting on Beltalowda.