This scenario is almost literally inconceivable. With nobody doing those jobs, where are all those striking workers going to get food?
If a strike like that ever started, it would be guaranteed not to last. It is self-defeating; the companies would only need to wait long enough for those on strike to realize that they are hurting themselves.
You take too much for granted, FP, and you never consider what might happen if the simple things you depended on were taken away. Ever watch the show Revolution?
Maybe you should. It's a drama about a post-apocalyptic scenario that occurred not because of zombies or some other absurd infestation, but because the Earth lost the ability to produce electricity, and humanity had to learn to survive without any of the things it provided. Which was almost everything.
Not many managed.