I think on the current situation of things across the globe, I would sincerely advise parents should give birth to a number of kids they can bring up in consonance with their income.
Because as an average income earner, you shouldn't give birth to children you cannot feed or take good care of.
gone are those days you need people to help work in your farm as parents.
Today, you have to spend money on school fees, clothing, electricity bills, feeding until they are up to an age to start staying on their own.
I feel rich people, can afford to give birth to as many as they want because the economy favours them.
Agreed, the global situation need to be considered before giving birth to a child. It isn't a task that could end in a short time period. Growing a child requires additional earning, compared to the past there is good awareness around and people have been giving birth accordingly. In my country the number of child have reduced to two and over time this could move to one as the parents are thinking wise and doesn't want their child to suffer. In the past the children grew by their own and now those opportunities have shrunk due to the difference in the parenting. Everything is on a cyclic process, and things could take a change with time.