They try to spy on people, because they know that knowledge (all important knowledge) is power. They use to symbolize that triangles/pyramids and just one eye. They have technology to spy on people unnoticed (spyware) ; so, now, with cellphones is easier (easy) than ever to spy on humans.
We have an apparent contradiction between privacy and monitoring/omniscient (desire to know everything), so we try to figure it out nicely in every case.