You know, this is human nature at its most basic: borrowing money to pay for a party and then the next morning, railing against the lender for being so evil and crass as to demand repayment. That's humanity in a nutshell, trying to get whatever it can for free, and being downright offended if it can't. Entitled, selfish, and spoiled.
It takes upbringing to instill the character to fight this natural urge (and it is natural. Observe the average 2 year old. That's humanity.) You have to TEACH young humans not to be this way. We aren't teaching them. Well, conservatives are, but liberals aren't.