If you are going to make a blanket statement in your thesis then pull back from its correctness then best not to spout the original as hard truth
While poor people focus on immediate needs
There's plenty of rigorous research in this area to show that being poor and struggling actually creates mental barriers to achieving success
I'm going to keep leaning on that versus the blog post of some objectivist who peddles around stats to make up whatever argument fits his world view
If you are going to make a blanket statement in your thesis then pull back from its correctness then best not to spout the original as hard truth