There's more than just companies or people working in their free time. This might not be very popular for the libertarian fringe, but state support is an option

There's more than just companies or people working in their free time. This might not be very popular for the libertarian fringe, but state support is an option that's probably better than other models. And we already got that to a large degree, with plenty of software coming from universities or state-funded research projects. Granted, that might not be the next Javascript framework one needs to fill developer ennui.