Cameroonian healers enforced pay-if-cured contracts with spiritual authority

Economic theory says outcome-contingent pay should outperform pay-for-service exactly when a good result depends on real effort from both sides, because it aligns the provider's and the patient's incentives around the same goal rather than just the provider's process. But an outcome-contingent bargain only holds together if both sides trust the same account of whether the outcome actually happened — otherwise the payer can falsely claim it failed to avoid paying, or the provider can falsely claim success to collect anyway.

The formal healthcare institutions operating in the same rural settings — government clinics and NGO-run mission facilities — solved this by giving up on paying for outcomes altogether. Missions instead ran effort-contingent contracts: a fixed fee, with quality enforced by supervising the practitioner's process directly, checking records against treatment protocols and disciplining deviations. That worked because the mission was the practitioner's employer and could observe and punish effort.

Healers used spiritual authority as a truth-teller: patients believed healers could know the outcome and curse liars, so deferred fees held without formal enforcement.

Outcome contracts need a credible check on the truth; courts and insurers were absent.

Healers' spiritual status made them trusted arbiters of whether a cure happened.

Belief in curses gave reneging a real cost, so patients paid the deferred balance.

Trust in the back end let healers accept small upfront fees, sustaining the contract.

When verification is costly, route it through an authority your counterparty already trusts instead of building new infrastructure.

Field data on patient choices in rural Cameroon and Kenya showed this wasn't just theater: patients routed different illnesses to different types of providers exactly as the underlying contract theory predicts, disproportionately choosing outcome-contingent traditional healers for conditions (like chronic pain) where their own effort mattered as much as the practitioner's, and choosing effort-paid mission or clinic care for conditions where only practitioner skill mattered. The belief-enforced contract was shaping real economic behavior, not standing apart from it.