Just a comparison, Mozilla Foundation spent 62.8 million US dollars for software development, unclear for how much is spent on staff. ref: http://www.mozilla.org/en-US/foundation/annualreport/2010/fa...
Can we assume that Mozilla's software development is more technical than Wikimedia's software development? I think the only thing they have in common is that they're both non-profits.
I think Wikimedia would have a harder time to justify their spending.