Today I had an Uber driver rant to me about a passenger who was charged $110, and he only got $45. Charging more for trips based on supply and demand makes sen

Today I had an Uber driver rant to me about a passenger who was charged $110, and he only got $45. Charging more for trips based on supply and demand makes sense. Why wouldn't you charge more for passengers who are willing to pay more? But it seems completely ridiculous for Uber to treat that money differently and take 100% of it.