Exclusive: 182 experts say only debt cancellation offers chance of recovery but private investors are playing hardball

Some of the world’s most powerful hedge funds and other investors are holding up vital help for crisis-hit Sri Lanka by their hardline stance in debt-relief negotiations after the Asian country’s $51bn (£42bn) default last year, according to 182 economists and development experts from around the world.

In a statement released to the Guardian on Sunday, the group said extensive debt cancellation was needed to give the economy a chance of recovery and that Sri Lanka would be a test case of the willingness of the international community to tackle a looming global debt crisis.