I get your point, but you chose a really bad example. A properly underwritten insurance policy never has any theoretical upside to anyone except the insurer. Premiums should also theoretically be close to proportional to the actual risk. Your grandma's premiums would be very low, but, unless a tiger escapes somewhere near her, she'd never be able to collect. And, any reasonable policy would have specific exclusions for willingly and knowingly going somewhere that tigers are native. :P