FWIW, it is a way to keep poor people poor so there's less competition.

You can't be this retarded can you?
In the first place, countries with lower birth rates are on the path for disaster as the demographic shifts from working age people into the elderly.
Secondly, I'm pretty sure that poor people still exist with or without wholesale abortion.
Today, poverty in the United States has reached historic levels despite millions upon millions of aborted babies.
By your moronic philosophical observation, shouldn't poverty have been wiped out by now?