The Congress today said if its demand for a Joint Parliamentary Committee (JPC) to probe the Rafale aircraft deal is not met, the party will set up an inquiry commission if it comes to power. \u201cThe Rafale deal is the biggest scam of the century,\u201d senior Congress leader Anand Sharma said here. He said there was a \u201chike' in the price of the fighter aircraft which India is buying from France, and Prime Minister Narendra Modi needs to answer the \u201cmany doubts\u201d that have been raised. \u201cWhy is the BJP government so afraid of setting up a JPC on the issue?\u201d the deputy leader of Congress in Rajya Sabha said. \u201cIf this is not done, we will constitute a National Commission of Inquiry on coming to power," Sharma added. The apparent reference was to a probe under the Commissions of Inquiry Act. He claimed the \u201cscam\u201d had global ramifications as there were \u201cfive other bidders\u201d for the deal. Sharma, who is a former commerce minister said the Rafale deal and demonetisation are the two biggest scams of the Modi government and will also be the main issues in the coming polls. Congress president Rahul Gandhi recently demanded the setting up of a JPC into the Rafale deal under which India will buy 36 planes. The party claims the aircraft will cost significantly more that what the previous Congress-led government was negotiating. Sharma asked why public sector Hindustan Aeronautics had not got the related offset contract under the deal. The Anil Ambai-led Reliance Group, which bagged the offset contract in a deal with Rafale manufacturers Dassault, has served a \u2018cease and desist' notice on Congress leaders, asking them not to make defamatory allegations.