The Syndicate Bank Officers’ Association (SBOA) has called for stringent measures for defaulters from the government like attaching personal properties and declaring wilful defaulters as criminals to check banks’ non-performing assets. “Nearly 50 per cent of the NPAs — at around ₹1,00,000 crore — are from 30 to 40 big corporate houses, and they are patronised by the Government mainly by their inaction,” D S Punja, General Secretary, SBOA, said.