Dodged Jury Duty Yet Again

Recently my services were requested to serve on a jury. I wrote back explaining that I was a foreigner taking away good American jobs. They wrote back and excused me. I don't see why more people just don't claim they're a foreigner. If the jury people really knew, they wouldn't be asking me in the first place. And as far as I know, they didn't do anything to make sure I was telling the truth.

Seems to me that becoming a citizen just means sitting on a jury. What's my motivation?