Atticus was saying, “With people like us – that’s our share of the bill. We generally get the juries we deserve. Our stout Maycomb citizens aren’t interested, in the first place. In the second place, they’re afraid. Then, they’re – ”
“Afraid, why?” asked Jem.
“Well, what if – say, Mr. Link Deas had to decide the amount of damages to award, say, Miss Maudie, when Miss Rachel ran over her with a car. Link wouldn’t like the thought of losing either lady’s business at his store, would he? So he tells Judge Taylor that he can’t serve on the jury because he doesn’t have anybody to keep store for him while he’s gone. So Judge Taylor excuses him. Sometimes he excuses him wrathfully.”
– Harper Lee
To Kill a Mockingbird, Chapter 23. Atticus explains to Jem why the people of Maycomb don’t want to serve on a jury. Their personal concerns are more important than their duty to the community. They fear having to publicly take a stand and upsetting people they do business with.