Addressing public events, he also asked the dishonest not to not underestimate the mood of the country against corruption.
"Dishonest people, you should not underestimate the mood of 125 crore people. You will have to be afraid of it... Time has come for ruin of dishonest people. This is a cleanliness campaign," Modi said just with a week to go for the expiry of the December 30 deadline when the scrapped Rs 500/1000 notes can be deposited in banks.
Earlier in the day at a Sebi function, Modi promised more "sound and prudent economic policies" which would be "not for short-term political point-scoring" but for "larger national interests.
"Let me make one thing very clear: This government will continue to follow sound and prudent economic policies, to ensure that we have a bright future in the long-run. We'll not take decisions for short-term political point-scoring. We'll not shy away from taking difficult decisions, if those decisions are in the interest of the country," Modi said.
More From This Section
Asking the regulators and taxmen to think about the contribution of market participants to the exchequer, Modi said, "The low contribution of taxes may be due to the structure of our tax laws. Low or zero tax rate is given to certain types of financial income."
The Prime Minister's remarks assume much significance ahead of the Budget to be presented on February 1.
"We took a big decision against black money and corruption on November 8 and 125 crore Indians endured pain but did not stop supporting me. I want to assure people of the country that this battle won't end till we win it," he said.
the decision (demonetisation). They even thought of managing bank officials to get their black money converted into white. And that's how many of them got caught."
"I said there will be pain for 50 days (after demonetisation announcement)," he said, adding people are ready to bear the pain in the country's interest.
The Prime Minister inaugurated a new campus of capital markets regulator Sebi's National Institute of Securities Markets (NISM) at Patalganga on the outskirts of Mumbai at an event also attended by functionaries of the Maharashtra government led by the governor and the chief minister, Union finance minister Arun Jaitley and Sebi chairman U K Sinha.
On the need to increase levies on the capital markets in the light of amendments to the many of the bilateral investment and taxation treaties, Modi said, "Those who profit from financial markets must make a fair contribution to nation-building through taxes.... We should consider methods for increasing it in a fair, efficient and transparent way.
"... Now it is time to re-think and come up with a good design which is simple and transparent, but also fair and progressive," Modi said, adding for various reasons, contribution of tax from those who make money on the markets has been low due to illegal activities and frauds or due to the structure of our tax laws which offers low or zero tax rate is given to certain types of financial income.
He further said that when the global economy is fighting lingering slowdown, "India is being seen as a bright spot.
(Reopens DEL23)
Addressing a gathering in Pune after laying the foundation
stone for metro, Modi said the value of "small people" in the country has increased the way the value of Rs 100 bill has gone up after demonetisation.
Modi said that after the 50-day period, the hardships of honest people will decrease and the problems of the dishonest would go up.
The Prime Minister while announcing the demonetisation decision on November 8 had said there would some inconvenience to people for the initial 50-day period, till December 30.
"The decision has been taken after a lot of thought and I am sure that I will be successful," he said, adding people with bad intentions and dishonest bank officials are going to jail.
He said the "war" against corruption and black money is the fight of 125 crore people "which would not stop and that a handful of people would not able to suppress their voice".
Modi asked the audience to switch on the flashlights of their mobile phones and wave them if they "sided with the government and approved of its decisions".
Meanwhile, Congress' city unit staged a protest on the route from where the PM's convoy was to pass through, but police detained at least 100 party workers.
He said the Congress workers were taken to Khadaki police station and later released.
On the Pune Metro project, Modi said for 15 years, the development of Maharashtra has suffered.
"During the election to the state Assembly, I had told you that a double engine can bring Maharashtra up. Now see, due to these two engines (state government and Central government), metro project of the city has been approved," he said.