The more possessions and money you desire, the harder you work to buy more things in the economy, pushing up GDP, and driving up the value of stocks, real estate, etc. that rich people own.
Wouldn't it be the opposite?
Wanting possessions definitely fuels you to work hard, but you know what gives people even more drive? Existential threats like not being able to afford food or keep a roof over your head. A man with his own house and his own car and no debts is a man you don't have much leverage over. A man who needs to keep sending you a monthly flow of money in order to have shelter, entertainment and whatever else is a man who you control on a fundamental level.
the problem is that harder work doesn't necessary bring success in rent seeking economy.