Why do I have to have a receiver to view channels I pay for?

Most digital channels are encrypted for the purpose of preventing unauthorized viewing.  Because of this, these channels do require the use of a device which can be authorized to decrypt the signal such as a cable box or cable card for TVs/devices equipped to use them.  Most cable ready TVs will still be able to access the basic analog channel line up without additional equipment.

You can visit http://www.cox.com/channels to find out more about channel line ups.  Most of the TV Starter package channels you're subscribed to should be available on a direct to set TV.