I am skeptical that the model where people carry out defined tasks in exchange for getting paid can properly discharge the obligations of trustworthiness and disinterest that are necessary for the proper functioning of software supply chains. I'm thinking that probably people whose motivation is primarily personal gain will seek out ways to exploit their users' trust for additional personal gain, for example by bundling adware and other malware into their software the way Microsoft does with Windows, or only releasing security updates to paying customers.
Open-source licensing provides some protection against this problem, because it guarantees you the legal right to switch to a non-malicious fork; but the whole reason we're talking about open-source supply chain security in the first place is that your vulnerability to your chosen upstream is still far from nonzero.