DCL went to the "auto-gratuities" several years ago, largely in response to the fact that so many Europeans weren't a tipping culture. I guess if Australians (or any cruisers) are going to go so far as to make the effort to remove tips, they really don't care - they want to make a point at the expense of the employee not the employer. Not a very intelligent move.
However I'm not sure a higher price tag overall is the answer, though. Maybe mandatory tips...personally I do like knowing that specific amount goes to the employee, whereas when it's all rolled in into the cruise fare you don't know how much (or how little) the employee(s) gets.