Too many br*nds at the grocery store, I can't decide, why do we need 14 br*nds of laundry detergent? Destroying br*nds is essential for the revolution.
There will be one br*nd of soup. One br*nd of soap. One br*nd of orange juice.
Lenin's Own Orange Juice. A man we can trust.
The rule was you always gave back in gifts/services slightly more than you got in the first place. That way the debt and obligation was always there between people. To pay back in full was essentially saying "I dont want to see you or have you in my life anymore." You probably practice this in your daily life with your friends or significant others even if you dont realize it. Its the default social relation and the one we "grew up" in so to speak as a species.