Some great answers here so I'll do something different and I'll give myself as a real-world example.

As a young adult, through a twist of luck, I found a cheap place to rent, so was able save a good amount of my income. I used that saving to get a loan, buy property, and used that property to get a loan and buy a property, and then do it once again. A short while later I now have no debt, can sit on my arse browsing lemmy in Bali (exploiting geo-arbitrage), and live off the market-rate rents my tenants pay back home.

If my tenants didn't have to pay market-rate rents, they too might be able save some cash and become capitalists themselves. I could lower the rent, but then I would have to get a job and actually earn my living again. People born into wealth can even skip that step of having to earn their initial capital.

But whats the point of owning income producing assets (like property, or business) if you're not improving your situation with it? The ONLY benefit of the capitalist system is that it allows the capitalist to reap the benefits of other's work, thus reducing the burden of the capitalist to work themself.

It's a ridiculous situation, I should not be able to live as I do, simply because I got a lucky break at the start of my working life, an opportunity that is given to the very few. The system should change.