If you want a clear demonstration of the management clusterfuck that is Mozilla, see http://arewereorganizedyet.com/ The average time between reorgs in Mozilla is something like three to four weeks.
It's really not clear to me what definition of "reorg" is being used here, given those dates. The only one that might plausibly fit is "any change in the management structure, anywhere in the organization" to give you that frequency. As in, to get this frequency you have to count "a manager has too many reports, so another one was hired to take part of the load" as a "reorg".
That's fair, though it does seem like a fair number of people at Mozilla don't actually know what their reporting chain is nowadays yet alone who needs to approve any expense.
I'm not sure why people wouldn't know their reporting chain. It's in the company "phonebook": search for yourself, then follow the "Manager" links...
Expense approval is less clear, because it's not obvious which things your immediate manager can approve and which need to be kicked higher up the chain. But in my experience asking your manager works pretty well. It's possibly I've been lucky with managers.
