People have to get pay if they work if they work for free that is called slavery hopefully in the future the stuff that we need will be free like food and water will be free. Lets say you have to buy a house these days.

The electric and water bills you have to pay of taking care of your house hopefully in the future
electricity and the water will be free and the machines will give any body more electricity water and clothes of food.

Lets say you want to buy some thing from the store hopefully you can type on line what you want to buy and type in your email address and the store machines will put the food and water inside the store tunnel.
And the store tunnel will make sure that your food is clean finally the store tunnel will shoot the food into you house tunnel and the house tunnel will shoot the food inside of the house.