Finance chiefs from the Group of 20 economies will discuss ways to stem tax avoidance when they meet this week, with the so-called Panama Papers serving up uncomfortable questions for politicians and business leaders.

They are also likely to push for greater coordination in fiscal spending to stimulate demand and keep the global economy from faltering as financial markets remain vulnerable to shocks.

At the two-day meeting starting Thursday in Washington, the finance ministers and central bankers may call on regions that function as tax havens to join an initiative linking roughly 100 nations that would see them exchanging information about financial accounts.