Wisconsin’s Legislature finally passed a bill this week stripping public-sector unions of most of their collective-bargaining rights.

It’s a victory for Republican Gov. Scott Walker and his fiscally struggling state — and a sign of hope for states, like New York, that are desperate for some relief from public-sector unions’ stranglehold on state and city fiscs.

The Wisconsin bill restores some balance by trimming unions’ collective-bargaining rights so local governments can better manage unavoidable budget cuts.

But collective bargaining goes to the heart of unionism, and labor sensed a major threat — one that could be echoed across the nation, particularly as other regions face similarly dire budget woes.

No wonder chaos prevailed at Wisconsin’s capitol for weeks.

But let’s face it: Union preferences, often paid for with campaign-donation bribes to cynical pols, have made cost-effective government impossible — and public budgets unsustainable.

Just look at New York’s seniority-based teacher-layoff law. Thousands of enthusiastic young teachers stand to lose their jobs this summer because of union-backed measures that protect veterans, no matter their merit.

The Wisconsin bill offers hope for balance elsewhere. Applaud the victory.