So much for equality of opportunity.
Why should interest on your accumulated capital be a right? Interest on capital comes directly from someone else's labour.
Jeeeezus Christ Slim, this isn't as hard as you are making out to be. Do you want to go back to the barter system where nobody has "money"? Care to trade me a basket of eggs for a new wagon wheel?
Interest on capital isn't a right. Its an agreement between two parties. You can do it safely at a bank, and earn a little. Or you can buy cattle futures and make a killing or lose your shirt. But the key is BOTH parties want to participate.
Lets go back 5,000 years and there is no money, so barter system. I own a cow (that is if I'm allowed to "own livestock" under your economic system. But I'm tired of milking that cow every morning. You need milk for your family. I tell you if you want to milk my cow every morning, you get to keep 1/10th of the milk. You agree. I agree. Its basic capitalism without the money.
If you get your own cow, you tell me to milk my own cow. If you get a better cow milking gig, you move on and get more for your family with the my neighbor, then good for you - I have to do it myself.
Money just replaces all of the pain in the ass that comes with the above. Dollar bills, Euros, and British Pounds are a means of exchange making it easier for society to grow and progress as a whole.