demonetisation ..... good or bad decision for India

This may be good decision but for the countries who having limited population, India is second highest populated country where every second person belongs to lower middle class and the richer are beyond the class. The Gap between the class is impossible to cover , where people lives under the bridges can't deal cashless. Duplicity of currency cud't stopped , its still available with new face. Black money transections got more easy with 2000 Rupee note. Earlier there was only 1000 rupee note was available , now its really easy to carry huge amount. Though i too understand that there is merit & demerit of any decision but cud't found much merit of it in India......