In our labor system, a small number of individuals are by definition going to be payed, as employees, a small amount of the value that they add in order to make their boss wealthier.
Over time, the employees get paid a constant amount of money that they need to spend for living expenses, but the employer wealth will compound and accumulate over generations.
It's a system that comes directly from medieval serventry, designed to concentrate the wealth in the hands of the noble.
Take for example a large surface supermarket, with 100 employees making minimal wage. If those same persons would each own their small family shops and serve the same amount of customers, you would have 100 families well off making way more than minimal wage.
Serve those same customers through a supermarket, and most of the wealth will be concentrated in the hands of the supermarket owner, while the employees make only scraps.