No, it's not, and it's not the argument the article is making. The article is arguing for developers receiving public supoprt financed by taxing corporation who are currently evading massive amounts of money.
This is not a case of "no one", anyway. Throw a coffee if you can is already how this works. And it's not just "a coffee", plenty of openly available software has alternate revenue streams, support from corporate backers and other sustainability tools besides voluntary crowdsourcing. The OP is pondering a systemic solution, not a moral obligation based on capitalist conceptions of how much time is worth and charity.