Because half the population has their entire life based around the party. Lots of people live off government handouts in Sweden, we have a massive welfare class. We also have a giant public sector full of people entirely dependent on jobs programs. There are huge numbers of people with useless degrees doing useless things who could only get a job in the public sector. The state provides these people with rent controlled apartments and an entire lifestyle.

There are tons of single mothers with a degree in sociology who work for the city council and who need daycare, rent controlled apartments, state provided activities for their children and who work with managing the socialdemocratic project. Vote right and their entire life would collapse. We have tens of thousands of journalists and culture workers who live off the state and who recieve all sorts of state subsidies on top of that. They would be delivering pizzas and living in a friend's sofa alternatively have to go back to school and learn a trade if the right got their way.

These people will defend the socialdemocrats with great vigour and enthusiasm even if we become Lebanon. It is their entire life, their existance, their identity and place in the world. The party has replaced family and religion for them.