She didn’t, she just prevented unprofitable deadweight from dragging the entire country down with it. She’s hated by those that believed that their unprofitable, subsidised existence at the expense of everyone else was somehow a natural right. If Britain had continued with the cloistered protection of failed industries it would not resemble Greece now, it would never have got that far, but it would have suffered financial ruin similar to Argentina in the 1990s. That Thatcher’s policies were correct is underlined by them being embraced so thoroughly by her opponents.
I don't hate her for what she did ,whether she was right or wrong is, like most things ,debatable and now moot. I do take issue with the fact that she undertook her revolution with what I can only describe as zealous glee.
She was ,and remains the most polarising British politician of modern times.
So British politics ever since have remained insipid with 'spin' ,focus groups and the like.
I wonder if the early demise of such an oversize personality would leave room for the rise of another conviction politician as the downside of this type of politician would not be so readily seen.
I will generalise and say that all politicians have a touch of the peacock in them and an oversize sense of self belief. To be succesful though they have to appear to be all things to all men, and thier flamboyant aspects are suppressed.
We may, if this tendency is encouraged in time see a wider gap between right and left as expressive politics become more acceptable.
Also without wishing to condone acts of terrorism the fact remains that a proportion of the UK would not have shed a tear over her death, after all Spencer Percivil's killer was cheered by large crowds on the way to his execution.

The Conservitive party may well win the next election with a sympathy vote but wthout a strong leader they may well split between between 'wets' and 'drys' though this will be of small comfort to Labour who have troubles of their own.
This may well lead to minority governments ruling with 'supply and confidence' agreements with the minor parties.