[DRAFT] Clarifying the narrative on GST cuts

From The Tantri Files — verbatim writing from Prof. Tantri’s WhatsApp messages, with his blessing. This piece arrived on September 5, 2025, a few hours after the GST rate cuts were announced, and was followed by a brief clarifying exchange with classmates.

Clarifying the narrative on GST cuts

A common misconception in the public debate on GST rate reductions is that their economic impact can be judged without distinguishing short-run Keynesian dynamics from long-run general equilibrium effects.

Short-run (Keynesian) perspective

If prices are sticky, investment is fixed, and government expenditure remains constant, a GST cut effectively increases the fiscal deficit. In that setting, aggregate demand may rise, but the distribution of gains matters: while consumers facing lower GST may spend more, others (such as consultants or suppliers paid by the government) may see reduced incomes as the state’s fiscal space shrinks.

In a balanced-budget setting, the net demand effect is close to zero. One could argue that if GST beneficiaries have a higher marginal propensity to consume (MPC) than beneficiaries of government spending, there could be a positive effect — but we lack credible empirical evidence on such distributional MPC differences.

Long-run perspective

The real gains from a GST cut lie in structural effects.

By making goods cheaper, it shifts the leisure–work tradeoff, incentivising greater labor supply. Moreover, by raising the after-tax return on savings (to the extent firms do not fully pass tax cuts to consumers), GST reductions can encourage higher savings and investment. Both channels can boost long-run GDP growth.

In this framework, incomplete pass-through of tax cuts to consumer prices is not a policy failure — retained margins may translate into higher investment and capacity expansion. The only caveat is that markets must remain contestable: if artificial entry barriers prevent competition, the efficiency gains from reduced indirect taxation may be muted.

The follow-up

Later that afternoon, a few classmates pushed back: surely consumers should see the price cut, otherwise the whole point is defeated. Tantri replied:

A classmate: But shouldn’t the price cuts be passed on to consumers immediately?

Tantri. No no. The point is that as long as the market is competitive, it does not matter whether price cuts are immediately passed on. Incidence of tax need not be on whom it is charged.

Suppose, capital has absorbed the rate hike — it’s fair that it gets the benefit. If employees have, they should get the benefit. Competition is key.

Long term growth is going to come from increased production and not consumption. This one simple point 99% of those who come on TV do not understand.

Editor’s notes

Verbatim from the WhatsApp group on September 5, 2025. The mini-essay was sent as a single long message; sub-headings have been added for readability but no words have been changed. The follow-up reply has been condensed slightly to remove a duplicate sentence.

For background on the underlying Keynesian framework Tantri is drawing on, see Session 5 — Fiscal Policy, Crowding Out & Transmission and Session 1 — Economy in the Long Run.