much ink has been spilled
People have written a vast amount (about a certain topic). Typically followed by "on/over/about (something)." Following the scandal, much ink has been spilled about the country's history in dealing with corporate crime. Although much ink has been spilled on the topic, there has sadly been little action at a legislative level.
*over (with)
finished; concluded. (*Typically: be ~; get ~.) I hope this thing gets over with pretty soon. When will the lecture get over?
much ˌink has been ˈspilled (on/over something)
a lot has been written about something: Much ink has been spilled on the life of Shakespeare.