Compare the amount of publicity generated by the loss of 140 jobs at Twitter in Ireland with the announcement that Irish medical devices company Aerogen is creating 500 new jobs to manufacture a vaccine spray device for the Chinese market. Of course the Twitter story is about a consumer social-media product in Ireland. And the job losses have been triggered by the purchase of the company by one of the world’s richest men – Elon Musk. It’s a fascinating story. But look how easily the same multi-billionaire owner of Twitter can destroy value in the company he bought. Perhaps we…