The best way to incentivize the actors of the supply chain to participate in it in an ethical and transparent way is simply to recognize them an economic value for the services performed. Here therefore that from the producer to the final consumer, every interaction is economically rewarded with the cryptocurrency.
Like any widely used cryptocurrency, it has a value in the global market and can be exchanged or reused throughout the ecosystem to purchase goods or services or converted into FIAT currency through an exchange service.
It can have decreasing or increasing fluctuations (like BTC or ETH). It can be kept in a wallet. It can be invested and can generate profit in a decentralized ecosystem. Decentralized also means not controlled by governments or banking institutions, guaranteeing their exchange all over the world without any limitation.