The only point you have going for capitalism is the supposed productivity, but any system that has a way to reward performance can do the same just fine. There is a range of economic models between capitalism and communism, several of them very market based.

A good example which i always felt would work well with minimal systemic change is the free money system (freigeldsystem), which is largely private enterprise. The big differences are that all land and natural resources are owned by the public/the state, leasing it out to companies; and negative interest making the hoarding of wealth impossible.

These key changes give the public a large degree of power over the private sector, since they could simply choose not to lease any land to companies who are not compliant with the public needs, and largely remove the capitalist class - the owners, the profit parasites, the shareholders, the ones living off their hoarded wealth - from the system