How to Use "backstop" with Example Sentences

1. Would the penny-saving populations of asia at least provide a backstop ?
2. A backstop for money-market mutual funds expired on september 18th .
3. All agree that taxpayers should not provide a backstop for speculation .
4. The eurozone states are not large enough to provide a credible backstop to their financial systems .
5. It has made progress in building a welfare state , a necessary backstop that will allow people to spend more money .