It is considered to be a good step by many as they think it will:
Impact those who run the scam of Black money.
It will increase the cash reserve ration of banks that will lend to people especially poor at less interest.
It will bring money back which so far has been stored to skip the process of tax.
The corruption will go on until some harsher laws are enacted and muscle and money power are curbed.
The government needs to be very transparent if it wants to eradicate the menace of corruption.