Earlier quoted context omitted.
Making it an even percentage across the company is pretty common, it prevents middle management infighting and horse trading over who has to cut more and who gets to cut less. The actual decisions about which specific individuals, after the percentage is arrived at, however seems questionable if what you say is true.
This thinking is taught in MBA programs but does not map onto real businesses. If you're in the ice cube business and you made the profoundly unwise decision to set up vending machines in Inuit communities, you don't recover by laying off x% of both your Alaskan retail and Caribbean Cruise wholesale businesses.
The real world is thousands of times more complex then ‘MBA programs’ or theoretical examples from people who haven’t been in the hot seat making such serious decisions.