I don’t see why you single out non-western immigrants in the UAE and try to depict this as an outcome of corruption or abuse. Most non-western immigrants are subject to the kafala system, but even if they weren’t, their eligibility for citizenship (or not) would remain the same. After all, citizenship is off the table for even the highly privileged Western expat population that is not subject to the kafala system.

Again, the local laws allow for conferring citizenship on exemplary foreigners, which does happen, and so such countries fit easily into camp 2 by which a country has the right to choose who and who not it wishes to make citizens.