A UN poverty expert called on the CEOs of Amazon, DoorDash and Walmart on Tuesday to address allegations that wages at the US-based corporations are trapping workers in poverty, forcing them to rely on US Government benefits to survive.

In separate letters to Amazon CEO Andy Jassy, DoorDash CEO Tony Xu and Walmart CEO Doug McMillon, the UN-appointed independent expert on extreme poverty and human rights, Olivier De Schutter, requested a response to reports of inadequate pay, aggressive union-busting tactics, and the misclassification of workers as 'independent contractors', intentionally depriving them of traditional employment benefits such as minimum wage guarantees.