At some point, there will not be enough for everyone to be able to have their "stuff" and violence will ensue.
Complete breakdown of civilization as we know it...by design.
The design of those who are greedy for ever more power and control. To become the absolute authority, you have to break the will of the people, squelch all freedoms, and put all at the mercy of what they have been to believe is a compassionate and benevolent super government capable of meeting their every need. You control the message (the media), education (what the children will be guided to believe), and gradually take control of food, water, housing, means of production, and other necessities of life.
It is only when the government achieves much of its goals to make the people dependent that it is announced that the government will reduce resources available to the people. (In fact it will have to do that as no government can ever be all that it promises to be as a nanny state.) And the now weakened and government conditioned/brainwashed people panic and riot in the streets demanding that they receive the free stuff they have been trained to believe is their right.
Responsible leaders in government may try to fix things, but if you have a Lenin or Stalin or Hitler or Castro etc. at the helm, he now holds the power to squelch those in government who would try to head off total chaos. And once total chaos is achieved, then the 'benevolent' dictator steps in to take control of all and restore order. The now desperate people have no choice but to trust him. And then, with indisputed power, whatever he chooses to inflict upon the people will be the law of the land. He will be bound by no constitution or social contract of any kind.
And how willing the people are becoming to risk all that.