Perhaps the solution is a credit system that can be traded for goods and services, but can’t be invested. There’s no stock market, only goods and services in your community.
I’m generally in favor of Market Socialism as a medium term, achievable goal. Workers own the company and all profits go either to them or to expand the company as a whole. They still compete with other worker-owned cooperatives in the market. It wouldn’t solve all the problems, but it’d be a whole lot better than the system we have. Probably won’t be the final form of humanity, though.