Even Marussia can make a front wheel jack that works. It's inexcusable that McLaren's one simply didn't work.
It gets worse, they have had lots of issues with the jack not working during pit stop practice, yet still chose to use it during the race!
I assume its because a decision to change back would have required orders signed in triplicate, sent in, sent back, queried, lost, found, subjected to public inquiry, lost again, and finally buried in soft peat for three months and recycled as firelighters before it could be actioned.