Lets start by taking a look at each scenario.
1. Single person is not content with his current position, he decides not to mention anything due to a fear of losing his job.
2. Here, Hector talks to several people and they agree. They threaten to go on strike unless the company gives in.
The difference is that in the first, Hector is by himself, and in the second, Hector is with other people with all of them threatening to quit.
I hope this helps! :)