Taxes  are  a  tool  and  neither  inherently  good  or  bad   (assuming  you  believe  there  is  a  role  for  government  activities).

The  debate  is  really  about  what  governments  do  with  the  taxes  and  there  are  all  sort  of  different  examples  around  the  world,  maybe  even  a  few  that  the  authors  from  Oxfam  would  approve  of.