I've never seen any value in this argument. If I make Bugattis, I gain nothing by paying my employees enough to buy a Bugatti. In a two-person one-good economy, yes, I can't hire you to milk the cow for $1 and then charge you $2 for the milk, but this isn't going to lead to you starving among spoiling milk. The market will clear, the prices of labor and milk will equalize, because $2 is more than the market will bear.
With robots the price of the milk will go very low because it's so easy to make, meaning I will be willing to sell it for very little in return. You can get a near worthless job like collecting pretty rocks and buy milk with that.