Are you sure the higher middle class is not having children because of the lack of state support ? Doesn't being higher middle class suggests that you own your house and have at least 3000 euros a month salary ? Isn't it enough for one child ?
Why do you think people not wanting children because they are worried about the state of the planet for their children is because "propaganda" ? Are you saying climate change is propaganda ? Isn't every expert on the subject saying that we are not doing enough and that things are going to be worst even in the best scenarii ?