Let's use your analogy. When you went to the owner for payment, he gave you $300 for washing the car. The owner gave you, not your friend. You. The owner only

Let's use your analogy. When you went to the owner for payment, he gave you $300 for washing the car. The owner gave you, not your friend. You. The owner only wants to pay you for your efforts, and at not point wanted to pay your friend. Instead of asking the owner for payment, your friend now demands part of your $300, because you are less intimidating to bully around. Your friend also demands a portion of all the money from all other cars you have washed after that time you washed a car together. Because if it wasn't for that first car wash together, he claims you would not have been able to figure out the sales process for washing cars for money. So he is entitled to dividends for eternity.