Isn't it true that only around 10% of Wikipedia massive budget is used to actually run the core website? The rest goes to bloated initiatives in the Wikimedia foundations orbit.
[1]: https://wikimediafoundation.org/wp-content/uploads/2025/04/W...
There is probably a lot to criticize, but you need to go deeper than "salaries" are bad. You need some of those to actually run the website.
There's also the need to support the staff and volunteer developers, which includes wikimedia cloud services, git hosting, config management and orchestration, CI, community hosted tool/bot services, etc.
WMF has ~600 employees, and that's quite lean, for a service of their complexity.