Internal Speaker Cabling

What is the use of Highend speaker cables,when the quality of our speakers internal cabling is inferior than the speaker cables used to connect our amps to our speakers.I guess what I am asking is should the internal speaker cable in most if not all speaker brands be upgraded to a similar highend quality.When for example most audiophiles purchase cables in the thousand of dallars price range.I doubt that speaker manufacturers are even spending hundreds of dollars on internal wire!Please let me know your thoughts Thanks.