Perhaps we can create a system whereby one exchanges skills for products and services? But then how do we scale such a system... money might work, unless you're advocating for communism
No one said anything about replacing something. Fortunately our systems (assuming we're talking about the west) can evolve and change within, without throwing it off the boat. You can introduce public health care without abolishing capitalism. Same goes for paid maternity leave, supporting unions, etc. In my understanding we're having a political discussion here, not a theoretical one.