That is where you mention his own greed and the idea of property rights.
Or also do the math of how much more would he make if the owner took 1/2 the pay and evenly distributed it. It is probably no more than $10/month, so not worth it. Also, if an owner can't get rich owning and running his own business, then why would he invest in it ever? Owner's invest money up front to pay a worker's wages. So the worker gets paid today. The owner has to wait until the product is manufactured, sold, and the money received before he gets his cut, in the future. Just like a loan, $1 today is worth more than $1 in the future.