The article is well written but I'll pull out probably the most important stat: of the canton’s 201 former lump sum beneficiaries, 97 left, amounting to loss of CHF 12.2 million in cantonal tax receipts (avg CHF 126k per person).

What about the stat found in the next paragraph:

This left over 100 wealthy foreigners remaining in the canton. Depending on how much wealth they had and how it was distributed, 55 ended up paying more tax and 47 less. Their total cantonal tax bill of CHF13.8 million more than made up for the losses, so the canton did better than break even.

Don't get me wrong, I don't think Zurich was particularly hurting for losing the CHF 12 million in the first place. It's not that much money for a jurisdiction of rather affluent 1.4 million people. That they made more is bonus.