The number of words the sources take up compared to the main text is inconsequential Firstly the amount of text it takes to describe a source is entirely dependent on the person who originally inserted it and can be changed So counting the number of words doesnt tell us much And not to mention even if  of words were a good measure of sources I wish every article had this problem Too many sources Ive never heard anyone complain about that It can only be a good thing Sources dont need to be used to their full potential Sources need only back up the text after the fact Once adding a source no one needs to worry that its been underused Thats just silly