Indeed. If you were to truly run the government like you'd run a business, wouldn't you "fire" all the older people who are no longer performing at an acceptable level i.e. retired?
Obviously there are approaches that make sense to be common to running both business and government (that probably apply to most everything else as well because they'd seem like "common sense") but, at a high level, to say "run government like a business" is one of those things that only sounds reasonable (possibly) until you think about it.