The 30-Second Promise Check: Spot Math-Busting Claims Before You Act

by George Campbell – mtwx.ca

We’ve been trying to out-negotiate arithmetic for centuries. It’s never worked. Promises poll well; ledgers don’t care.

Here’s a pocket tool you can use in 30 seconds to test any shiny economic claim—tariffs, tax cuts, spending sprees, price caps, “efficiencies,” the lot.

The Three Questions

1) Where do the dollars come from?
From whose pocket, through which pipe, and when? Taxes, prices, borrowing, fees—those are the pipes. Trace payer → collector → timing. If you can’t trace it quickly, the cost is probably hiding in higher prices or future debt service.

2) What gets squeezed to make room?
Every “free” dollar pushes somewhere: outlays, prices, wages, margins, or deficits. Name the loser. If nobody loses, you missed someone.

3) Is it net, bilateral, same period?

Net: include all affected accounts, not just the poster-child line item.
Bilateral: account for both sides of a trade/transaction (buyer and seller; importers and exporters).
Same period: don’t let benefits in 2030 pay for costs in 2026 without saying so.

How to use it: Set a 30-second timer. Read the claim. Answer 1–3 aloud. If any answer starts with “growth will” or “efficiencies will,” that’s a red flag—not a disqualifier, but a cue to dig deeper. This is triage, not a full diagnosis.

Walk-Through #1 (Historical): “Tariffs Make Us Rich”

The promise: Raise tariffs to protect workers and boost government revenue—everyone wins.

Q1 (source): Domestic consumers and firms pay higher prices. Dollars flow at the till, not from foreign governments.

Q2 (squeeze): Household purchasing power and/or business margins. Some protected industries gain; downstream industries lose.

Q3 (net/bilateral/time): Netting the ledger, higher prices reduce real demand; trading partners often retaliate (the bilateral part). Revenues can bump early, but price/volume effects compound over time. As Hume’s price-specie-flow logic reminds us: flows adjust; the ledger balances; timing and prices move.

Verdict: Not automatically “bad,” but never free. If consumer costs, retaliation, and timing are ignored, it fails the check.

Walk-Through #2 (Modern): “This Tax Cut Pays for Itself”

The promise: Cut rate X, growth will surge, revenues won’t fall.

Q1 (source): Near-term dollars come from lower government revenue; the claim is that future growth backfills the hole.

Q2 (squeeze): If spending isn’t cut now, borrowing rises now—squeezing services later via interest costs.

Q3 (net/bilateral/time): Revenue lost this year must be matched against growth that may or may not arrive this year. Even generous dynamic scoring rarely closes the gap fully, and interest accrues in real time. Net the whole picture—including debt service—over the same window.

Verdict: Some tax cuts raise growth; few pay for themselves on a same-period, net basis. If offsets and timing aren’t specified, it fails the check.

Why This Works (History Rhymes)

McKinley-era tariff optimism: protection promised universal gains; the bill arrived via prices and foreign pushback.
Hume’s price-specie-flow (1700s): you can’t trap surplus without prices and flows adjusting. The pipes find equilibrium.

Different centuries, same math. The ledger always balances; only timing and price change.

Use Cases (What You Can Do This Weekend)

Headlines: Apply the three questions to the next “free” promise. If you can’t answer in 30 seconds, don’t share it yet.

Household/business: Before banking on rebates, subsidies, or “temporary” surcharges, run the check and budget for the squeeze point.

Conversations: Ask, kindly: “Whose pocket, which pipe, what timing?” You’ll raise the level of the discussion without raising your voice.

One-Page Card & CTA

Keep the 30-Second Promise Check on your phone or fridge:
Download the Promise Check Card (PDF)

Got a headline you want tested? Reply “CHECK” with the claim (verbatim if possible). I’ll run it through the tool and send back the 30-second read—no drama, just the ledger.

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Arithmetic is undefeated. Promises poll well; ledgers don’t care.

—So it goes.

Posted October 10, 2025 | Related: 15-Minute Mortgage Renewal Strategy (Mon) • CAD vs USD: Stop Overpaying on Travel (Wed)