Former Chief Economic Adviser Arvind Subramanian stated he left his position in 2018 after four years due to personal reasons and a belief his effectiveness would wane, not a fallout with the government. He acknowledged differences, citing the Goods and Services Tax (GST) structure, particularly the 28% slab, as an area of disagreement with the government's approach. Subramanian also mentioned the health of then-Finance Minister Arun Jaitley as a factor in his decision.