The Chinese government asserts that all of these relocation operations are voluntary. Human Rights Watch has conducted interviews, finding the opposite, essentially. I would maybe disagree with your characterization of the intentions behind these policies as being based on economic development. I see that as the veneer but not the reality and not the intention.
Are we seeing birth suppression in Tibet similar to what we're seeing in Xinjiang: forced abortion, forced insertion of IUDs and forced sterilization?