The 16th Finance Commission has the freedom to choose its population data. But it will not have the 2021 census data to go by. Population is a key determinant of how much a state receives as its share of the divisible pool of government resources. States that have stabilised their population growth, and, thereby, bumped up their per-capita income, would have gone further down that path between 2011 and 2021. Without the 2021 data, however, there would have to be an approximation of the performance of lagging states. The extent of migration over a decade would also involve an element of uncertainty. This makes assessment of social sector spending outcomes more difficult than it should be.
The Centre now draws less from the combined resource pool than the states, but is directing spending through capex and welfare payments. As the gap widens, states would need more unencumbered finance for their larger responsibility. The Centre is trying moral policing to drive fiscal prudence, but is not in a position to lead by example. This will be a subtext for further devolution.