Lately I’ve been noticing that the people who mainly should not have children, whether due to economic limitations, illnesses, or even mental instability, are the ones who have the most children, and many times they end up as single fathers/mothers. My question is whether it would be a good idea to implement some kind of regulation and set minimum requirements that must be met, mainly to prevent the child from ending up in the future as a criminal or a social burden due to those factors.


No because that would end up being abused by corrupt government to stop people from breeding for arbitrary reasons. It would lead to ethnic cleansing.
Instead, we should have programs to help make life easier for people and their children. Government subsidized childcare and education. Universal basic income and/or higher minimum wage. Help finding employment. Rehabilitation programs for drug addicts.