This will work greatly in India, most of my Indian friends say that most Indians don't have credit cards/prefer to pay with cash.
https://medium.com/uber-design/designing-the-uber-cash-exper...
http://techcrunch.com/2015/07/21/uber-gets-serious-about-cas...
And the Uber design post about how they made it work (in broad terms);
https://medium.com/uber-design/designing-the-uber-cash-exper...