> In fact staff cost have more than doubled over the last year, while page views are stable.
From the SCFs on Page 3 of your link, staff costs in FY2013 were $15.98M and staff costs in FY2014 were $19.98M. This is only an increase of 25%. I'll take your word on the traffic stats but your assertion that staff cost has more than doubled is easily disproven.
You are of course free to stop using wikipedia if you can't handle the fact that they ask for donations every now and then.