The serious economic challenges faced by Pakistan like, poor law and order situation, corruption, electricity and gas load shedding, escalating inflation and weak governance have put a serious dent on economy. Public sector must provide support to private sector and formulate long-term and sustainable policies to create healthy business environment for increasing local and foreign investment, said Islamabad Chamber of Commerce and Industry (ICCI) President Yassar Sakhi Butt, while speaking to a group of section officers led by Badar-ul-Arifeen, Director General of Secretariat Training Institute (STI) on Wednesday.