At what costs?
I've heard this narrative before as it has happened in many Western countries and it is continuing to happen in China. I don't have the answer, but I always wonder about the costs of lifting so many people out of poverty, for example, there could be costs related to: environment, quality of life, traditions and values, mental health, etc.
Along with that thought experiment, I wonder how did they get into poverty in the first place. A lot of areas that are now declared as poverty zones today may have been poor in the past, but were self-sufficient and self sustaining.