Treasury can give each developer an annual AI allowance. Whatever they do not spend can convert to compensation at year end, at a rate you configure, gated on actually shipping outcomes. It turns "use the budget or lose it" into "use it or cash it," which aligns spend with results.
Important: Yardstick does not move money. Treasury produces statements, ledger entries, and payroll exports. Your people and your existing payroll rails move the actual money.