Every now and then we dole out money to some body for the reasons we do not know but because it is an established practice. Who established this practice is some thing no body knows.
A lowly laborer generally asks for ‘chai paani’. He wants to have chai which is understandable but why water? This system has possibly evolved several decades ago. In those days chai did cost money but a glass of water came free along with it besides being a major content provider for the chai. So when you gave him some change he went away happily. Now that the water has become more expensive than chai and soft drinks, the practice calls for an amendment to properly reflect changes in the economic fundamentals that have taken place since then.