Since Sweden is generally known to be a well-functioning democracy, the seemingly endless rule of Social Democrats poses something of a riddle. Why is there no shift in power to other parties? Can this merely be attributed to the management and campaign skills of the Social Democrats and the lack thereof in the opposition?
It's really simple.
The phenomenon that a party after many years in power becomes one with the state, and creates an election machinery which is paid off in policy, is not unique to Sweden. It is probably one consequence of a lack of restrictions - by a Constitution, for example - on political power. Now it has gone too far.
Seems kind of like California.