Again, wealth does not equal need. You're assuming all of the desperately stranded people have $200 at the ready for a taxi trip that's normally only $20. And some people will pay whatever price for convenience, because they have plenty of money.

You can't just assume that everyone CAN pay whatever price is set, and just decides not to because they don't need it enough. In this scenario, the poor people die and the rich stay comfortably unaffected while using the resources others are far more desperate for.