Progressivity of the personal income tax schedule, including top marginal rates, bracket spread, and targeted credits (EITC-equivalents).
Rule of law as institutional substrate — contract enforcement, judicial independence, equal treatment before the law. Upstream of most other axes.
Ordonnance 24 January 1996 created CADES (Caisse d'Amortissement de la Dette Sociale) and CRDS (Contribution pour le Remboursement de la Dette Sociale) — 0.5% flat contribution on income, initially for 13 years, to amortise ~FF137bn of social-security debt. Repeatedly extended thereafter. Key instrument of Sécu-debt management.
Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.
Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".
Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.