The phenomenal rise in the number of returns filed, income tax collections and GST filling post DeMo clearly suggest that it has successfully influenced people to pay taxes and restrain from black money.
The Congress is promising to remove the licensing requirement; the shell companies will mushroom all over the country and the gains from demonetization will be lost. The corrupt will have a field day and nothing could be done about it.
Anyone who thinks that problem with Congress is only due to people heading the party and not with the mindset, just see the behaviour of Himanta Biswa Sarma when he was with Congress and when he is in BJP and Sidhu before and after joining Congress.
Had govt not demonetized 500 and 1000 rupee currency as no more legal tender, Indian economy would have crumble and crashed down and from such fall India would not have ever recovered.