is a bad idea because of 2 main very bad consequences

1. human population, like other species, is multiplying as much as possible depending on resources. Give a basic income for each person and you will see overpopulation until consumption reach the level of production helped by technology. After that upgrade technology or produce even more if possible. If the resources are enough for greater number of people and you have no problem there, pollution is a fact and is related to that increased number, affecting all citizens.

2. stupid people will make more children easier. idiocracy in making.