Keep the base, add a bonus
The base fee holds either way. Only the bonus rides on the outcome.
Illustrative shape, not plotted values. Same floor either way; only the top layer is contingent.
The largest audited example of this shape
$4.1B   paid in performance bonuses on top of base pay, in Medicare’s Shared Savings Program (2024).
Of 476 participating groups. Source: Medicare Shared Savings Program, PY2024.