In return you get to live in a society with high trust, little crime and good social services.
This requires trust and ethics and the will to enforce it politically (and maybe a small homogeneous population).
The incentives in capitalism actually work out. When you can only spend your own money, and you have the freedom to choose how to spend it, markets are stochastically optimal for a huge range of allocation problems. Any sort of centralized system that tries to have only "the advantages of capitalism" usually fails because it doesn't make any sense game-theoretically or from an optimization perspective.
I'd say very soon you'd see fat cats sitting and deciding that on average their friends do better than the rest and here we are again.
The fact is there is no opt-out, you do have to participate in the capitalist system to survive, and even if you somehow manage to live in the wilderness, capitalism will eventually come and beat down your door to tell you that the land you're camping on now belongs to someone else, and would you kindly move along? Capitalism claims all resources, then sells them back to you in exchange for your soul. It was this realization that eventually motivated the Unabomber.
The problem usually is what people mean by "capitalism". In the last decades, too much people equate neoliberalism to capitalism. They are completely different, as neoliberalism is closer to corporativism and fascism than actual capitalism (the state needs to spy you, wealth redistribution is bad, companies have the same rights as people, ...).
Public health care, compulsory education, the rule of law are the source of wealth creation. For that you need people with the freedom to pursue their business and their careers, but also progressive taxes and wealth redistribution.
Capitalism is a word charged with a too much political charge to get reasonable discussions.
As Joan Robinson said, "the misery of being exploited by capitalists is nothing compared to the misery of not being exploited at all."
Being paid for work you do not have to do is not slavery. You see we built this thing called civilization whereby instead of starving when crops fail, dying at age 30 with dysentery and living in fear of being bludgeoned to death by a rival clan, we can exchange our labour for security, health and resources.
It's not perfect but if Capitalism ain't pleasing you then ask the person working that outsourced job what their grandparents thought of Communism, an ideology that crushed the very soul of China and brought misery, mass death and madness.
Or just ask them what work they'd be doing if Capitalism wasn't keeping them enslaved in jobs.