It is a crazy concept, because taxes are coerced by governments under the threat of violence, whereas the freedoms of FOSS software are intended to be entirely non-coercive. To require compensation of any kind for access and the right to use and distribute code is contrary to the spirit of free and open source software.
If people want to do that, then fair enough, just don't call if free or open source. And don't license your code under free or open source licenses if you care about getting credit or compensation or anything but maximizing software freedom.
> It is a crazy concept, because taxes are coerced by governments under the threat of violence, whereas the freedoms of FOSS software are intended to be entirely non-coercive.
In doubt, you will have to enforce the freedoms of FOSS by going to a court (i.e. use the governmental "violence enforcement system"). On the other hand, if you pay your taxes "voluntarily", you won't be coerced by the government.
In other words: in both cases threats of violence are involved.
If people want to do that, then fair enough, just don't call if free or open source. And don't license your code under free or open source licenses if you care about getting credit or compensation or anything but maximizing software freedom.