such greedy persons like the blog author do take away resources they don't really need from people who may really need them. For example, cab drivers' kindness

such greedy persons like the blog author do take away resources they don't really need from people who may really need them. For example, cab drivers' kindness to the people in need is a limited resource as the drivers just can't give free rides to everyone. The free ride the girl took may have been given to somebody who really lost wallet and/or may be in emergency, etc...