Short answer: It depends on your goal. If the goal is to keep the lowest wages from quietly shrinking when prices rise, then yes—tying the minimum wage to the cost of living (indexing) is a straightforward way to preserve purchasing power. If the goal is to guarantee a locally “livable” standard, simple inflation indexing isn’t enough, because living costs vary widely by place and over time (especially housing, childcare, and healthcare).
Ways to design it
•Index to inflation (CPI): Keeps real wages from eroding; simple and predictable. Cons: Doesn’t account for local cost differences or productivity growth; data revisions and lags.
•Index to local cost of living: Better matches high-cost vs. low-cost areas. Cons: More complex; cost-of-living measures can be noisy; creates different floors across regions.
•Index to the median wage or add a productivity factor: Maintains a stable position in the wage distribution and shares growth. Cons: More volatile; may outpace small firms’ ability to adjust in downturns.
•Hybrid: Set a target level, then automatically adjust annually by the smaller of inflation or wage growth, with caps/floors, and allow higher local minima.
Trade-offs to weigh
•Employment and hours: Typical, gradual increases show small average effects, but impacts can concentrate in certain groups (teens, very small firms) or sectors; very large or abrupt jumps carry more risk.
•Prices and business margins: Some pass-through to prices and pressure on margins; predictability from indexing helps firms plan.
•Equity and poverty: Higher minimums raise earnings for many low-wage workers; indexing prevents backsliding but won’t solve affordability in very high-cost areas by itself.
•Geographic fit: A single national floor can be too low for expensive metros and too high for very low-cost areas—hence arguments for a national baseline plus higher local floors.
Good practice
•Use automatic annual adjustments to avoid long periods of erosion and then disruptive “catch-up” hikes.
•Choose a clear anchor (CPI, local COL, or median wage) and publish the formula so firms and workers can plan.
•Phase in changes and include small-business transition support.
•Pair the minimum wage with complements: Earned Income Tax Credits, childcare and housing supports, transit access, and robust wage-law enforcement.
Bottom line: A minimum wage that at least keeps up with inflation is a practical baseline to protect real earnings. To match what people actually need where they live, consider layering in local adjustments or setting higher local floors, and complement wage policy with tax credits and cost-side policies.
If you share the context (federal vs. state/city, and your top priority—jobs, prices, or poverty reduction), I can sketch a tailored indexing formula and phase-in plan.