Even if you cut everyone doing software development (which would in itself probably cause a collapse since that is critical to keeping wikipedia running), cut all the lawyers (also pretty important), cut the trust and safety people, etc - you are still left with quite a lot of sysadmins, more than can reasonably be handled by a single manager.
Now, if your primary objective is not to run a website but something else entirely, then it does make sense for your infrastructure and the salaries of the people maintaining it not to be the largest part of your budget.