So right now, people pay rent for shelter, they buy food, they need to pay for childcare and all that kind of stuff.
Imagine that we collectively got people progressively into housing co-operatives, and we got more food co-operatives set up to grow and process food, and we used mutual aid more and more for tasks like childcare.
Progressively, the need for money becomes less and less. Eventually it reaches a point where all it takes is a small push to get people to just stop doing any work that isn’t part of their mutual aid efforts, and capitalism collapses.