But the expedition companies don't refund any of the money they collected from the climbers that would have gone to the Sherpas, instead pocketing it for themselves. They should either refund the money to the climbers, or pay the Sherpas what they were planning on paying them. Not just go "oh well, it's our money now!"
I think the $50,000-$90,000 is the 'all inclusive' cost covering a $10,000 Nepali government fee, sherpas, western guides, accommodation at base camps, food, drugs, bottled oxygen, trash removal, travel company profit margin and so on.