"An ill-informed criticism of the demonetisation is that almost the entire cash money got deposited in the banks. Confiscation of currency was not an objective of demonetisation. Getting it into the formal economy and making the holders pay tax was the broader objective," Jaitley said in a Facebook blog.

"The system required to be shaken in order to make India move from cash to digital transactions. This would obviously have an impact on higher tax revenue and a higher tax base," he added.

Demonetisation was a key step in a chain of important decisions taken by the government to formalise the economy, he said.

Other major decisions include targeting the black money outside India, application of technology in filing of returns and expanding the tax base, financial inclusion to integrate weaker sections with the formal economy, Jan Dhan accounts, Aadhaar law, Direct Benefit Transfer and the Goods and Services Tax (GST).

"It is now becoming increasingly difficult to evade the tax system," he said.

The Minister said direct tax collections in the two years prior to demonetisation had risen by 6.6 per cent and 9 per cent, which in the two years post-demonetisation rose by 14.6 per cent and 18 per cent with increases registered both in personal income tax and corporate tax.

Similarly, in the year 2017-18, the tax returns filed reached 6.86 crore, an increase of 25 per cent over the previous year. This year, as on October 31, already 5.99 crore returns have been filed which was an increase of 54.33 per cent compared to the previous year.

"In May 2014, when the present government was elected, the total number of the filers of income tax returns was 3.8 crore... By the time the first five years of this government are over, we will be close to doubling the assessee base," he said.

Demonetisation and implementation of the GST curbed cash transactions and boosted digital transactions, the Minister said.

"This formalisation of the economy has led to the tax payer base increase from 6.4 million in the pre-GST regime to 12 million tax payers in the post-GST regime."

The actual consumption of goods and services being recorded in tax net had now increased, giving a buoyancy to the indirect tax growth, benefiting both the Centre and the states.

In 2014-15, the indirect tax to GDP ratio was 4.4 per cent. Post-GST it has climbed to 5.4 per cent.

"Rates of taxes, both direct and indirect, have been reduced, but tax collections have gone up. The tax base has been expanded. GST rates on 334 commodities which were paying an effective 31 per cent tax pre-GST have witnessed a tax reduction," he said.

Further, Jaitley said measures taken for digitisation including the Unified Payment Interface (UPI) and the Bharat Interface for Money (BHIM) have resulted in increased transactions.

"Today Visa and Mastercard are losing market share in India to indigenously developed payment system of UPI and RUPAY Card whose share have reached 65 per cent of the payments done through debit and credit cards," he said.

The Minister said more formalisation of the economy will lead to more revenue and more resources for the poor, better infrastructure and a better quality of life for the citizens.