The social contract is just that, a contract. The unwritten contract of most developed countries has long been:

*Work hard. Get an education. Don't steal. Don't commit acts of violence. Don't try to foment unrest or rebellion. Walk the straight and narrow. In turn, you'll have a peaceful and adequate life. You may not be rich, but you'll have all your needs met during your working years, and you'll be able to retire when old with a bit of dignity."

For generations, the social contract was that anyone who played along and did things "right" would have a decent life. That decent life might mean living in a modest apartment your whole life, but it was achievable by the vast majority. Traditionally, if you couldn't achieve self-sufficiency, it's because you either were excluded from the social contract (like certain minority groups), you were born with some debilitating disability, or because you did something very wrong (like commit a serious crime.)

But contracts are two-way streets. When one side breaks the contract, it breaks for both sides. In wealthy countries, this old social contract has been broken by the rich. Millions are finding they did everything they were supposed to, and they still can't get a decent life. So with the contract broken, there's far less reason to follow it.

Most people do not avoid committing crimes simply because they fear the law. Most folks have an ethical belief that stealing and violence is wrong. Most people wouldn't do these things even if there were no police or prisons. But when you break the social contract, the portion of the population that finds committing crimes to be morally acceptable will inevitably rise.