And if you are doing a raffle for park tickets, you are not deciding to "help them in the form of tickets" for them. They signed up for the tickets. They want to go to the park. Is it a bad idea to allow poor people that want to access a park to have a chance of doing so?
And auctions are a way of optimizing pricing of stuff. But not everything in life is about money. For instance, organ donation recipients. Do you think an auction system for organs would be a better world than the existing systems? Should we just give the poor people that wouldn't be able to afford an auction for an organ some money, and then let them die?