That presumes that the intent of this effort – regardless of how it's spun – is to make government more efficient. It's hard to take spin like this at face value: voluntary departures may equally make programs less efficient since understaffed or more reliant on contractors, for that example.
By all means, we should be critical and say "this plan isn't going to work because xyz". That's an important part of the process. But at some point we do have to try something and see how it pans out, then try to adjust the plan based on the results.