"I'm rich enough, why should my kids get free school meals?"

1) Universal provision means for the price of giving food to your kids who "don't need it", kids who need it definitely get it. No barriers. No forms. No questions or tests.

2) Your kids won't bully the "free meal kids".

3) You have an interest in ensuring that your kids are not just fed but fed well. This means you won't put up with the "poor kid gruel" that you might campaign for to "save money" if you're not using the service. 

 @ec165dd5 

4. your children's education won't be disrupted by other children acting up because they are hungry.

5. you are a decent human being.