It's all about property rights. I have used the following example to explain this concept to many people in my life and they seem to like it. I hope it helps you and yours.

For these examples we will consider a family with five kids. Oldest is a cry bully. Second oldest is his sidekick. Middle kid is a quiet hard worker. Youngest are twins.

Public Property

If Mom and Dad buy a PlayStation for the family, it is public property for the kids. No one did anything to earn it, it must be shared equally. Life, however, is often unfair so unless Mom and Dad are gonna sit around with a stopwatch and monitor every minute of game-play it will never be equal. Squeaky wheel gets the grease. The cry bully will always get more time, the twins aren't really interested. The middle kid will get so much bullshit it won't be worth playing.

Private Property

The middle kid decides to mow lawns, save money, buy his own PlayStation. It won't be long before the older kids are whining "MOM! Middle kid won't share his PlayStation when he when he is working! NO FAIR! He not even using it!"

Mom doesn't want to listen to the complaints so she intervenes. "Middle kid, why are you being so greedy and not sharing? That's not very nice! Share with your brothers!" Communism. No respect for private property. Middle kid complains, "My PlayStation is dirty, my discs are scratched! Other kids have no respect for it." Mom says "They are sorry." They aren't sorry. Cry bully smirks and continues to abuse middle kids property. (Animosity and distrust build). Now the middle kid leaves his PlayStation at his buddies house, who will respect it. (Black market develops)

Dad has a different plan. He respects property rights. "Cry bully, what's wrong with you! Middle kid earned his PlayStation by getting off his ass and doing something useful with his time. Now you want to use his stuff when he is working!? I'm not surprised he won't share because you don't have any respect for anything! The discs are scratched up because you can't even be bothered to put the games back in the case. Then the game skips so you bounce the chip-grease-covered controllers off the walls and bitch that your controllers aren't good enough. DO NOT TOUCH your brother's PlayStation unless he says you can!" Property rights.

Now middle kid can "rent out" his PlayStation to the other kids with strict rules. 1. You do my chores so I can mow more lawns. 2. No food or drink. 3. When I want it, I get it, you turn off your session whenever I say. 4. Games go in the case when not in use. Now we get to build trust, goodwill, and a healthy thriving economy. The people who are useful are in charge of property they earned. Useless assholes have to play nice and do the chores of their younger brother, or not get to use the "good" PlayStation.

Parents, choose wisely.