> If a person earns a low wage, he shouldn't be able to afford children because he shouldn't have them.

The right to found a family is enshrined in Article 12 of the European Convention on Human Rights [1] and Article 16 of the Universal Declaration of Human Rights [2].

I agree it's a bit of a stretch, but at least the UDHR definition explicitly states that "the family is the natural and fundamental group unit of society and is entitled to protection by society and the State"... for me, that clearly implies economic protection, i.e. a society has to make sure that people can actually exercise that right - because how useful is a theoretical right to something (be it to found a family, or to have the right to due process and fair treatment before the courts, or whatever else), when large swaths of the population cannot exercise that right, or have access to it effectively denied by circumstances outside of their but inside the government's control?

[1] https://www.echr.coe.int/documents/d/echr/convention_ENG

[2] https://www.un.org/en/about-us/universal-declaration-of-huma...