Curious if a system like this is plausible: Why must the market be purely capitalistic? Rather, why any market must bare the mark of others is curious to me; s

Curious if a system like this is plausible: Why must the market be purely capitalistic? Rather, why any market must bare the mark of others is curious to me; similar as they may be some should not be equal. Hypothetically - why not make raw materials in the traditional market(s) while also giving it a credit rating (valued in the market based on sustainability) - one that is transferable only against those same credits. So if a public need requires (x) and gains (theoretical) democratic support, credits can be used in place of monetary requirement to build these required needs.