There are 36 different situations; some of them occur more often than others.
With standard settings, I have yet to experience a General Strike, Teacher Strike, a Doctor Strike, a Black Market, or a Tax Evasion. Have you had any of them?
They definitely all work! But it might be that the way you ‘naturally’ play the game has meant they have not happened. If you aren’t pushing certain taxes beyond reasonable limits, you are never going to see the black market situation, for example…
Is there a General Strike situation anywhere? Never experienced that. I know that sometimes there’s a Railway Strike (just like London today) when you reduce Railway subsidies.