Moved from ‘FCC.gov Feedback’littlepeaks commented
"The CB Service provides a service for short-distance communications by individuals and businesses. Over the years, changes occurred to the service such as adding additional channels; however, the purpose of the service has remained the same."
Above quote is directly from the FCC.gov website. As such the current power limitations are sufficient. If you want to make longer distance communications, look into GMRS or amateur radio.