The mentally ill were turned out of hospitals in an Orwellian dumping program called “care in the community.” But the community would not or could not care for them, they soon discovered.
So Thatcher succeeded, insofar as she did, by convincing the middle class that the poor were stealing from them. She accused her liberal opponents of being facilitators of that theft.
It didn’t matter that it wasn’t true. It was political gold dust. Resentment gets people to the polls.
Through this class division and bait and switch she was also able to cover up the fact that she herself was stealing from the middle class on behalf of the rich. That’s how she became one of the political architects of modern America too.