I don't think so mate, if you're struggling to provide, you're not going to create another mouth to feed. I'd hope people can override their need for sex with actually thinking about the consequences. Not all sex has to lead to pregnancy either, does it
I think the simpler explanation is that due to the state of the world's economy, reasonable people are choosing not to have children at this moment.
With the amount of people being locked together and lonely from lost of extended human contact, the birthrate should actually be considerably up.
I don't think so mate, if you're struggling to provide, you're not going to create another mouth to feed. I'd hope people can override their need for sex with actually thinking about the consequences. Not all sex has to lead to pregnancy either, does it