Modi's war against black money will fail.

Modi wants to unearth all black money. He will fail. Whenever a nation has high taxes, citizens respond by having black money. Modi wants more check, controls, punishments, etc to eliminate black money. This has never succeeded anywhere in world at any time in history. So it will not succeed in India.
The ONLY way black money can be eliminated is to have no or negligible taxes. Then citizens have no motivation to for keeping their money black.
If Modi truly wants to eliminate black money totally, I would suggest

• Eliminate income tax (and TDS).
• Impose a tax of say 0.1 on all bank transactions and 1% on all cash withdrawals from bank.
• Reduce the salary of public servants by the amount of income tax that was due, so that their take home salary is not changed.

Now, black money is totally eliminated. But no government is willing to take above steps because this crooks wants others to be honest, but their group of friends can be dishonest. Having simple clear rules like those above, that are difficult to bypass, will force everyone to be honest. That is not acceptable to politicians and their friends.