This article is biased and the Swiss are being incredibly disingenuous. The Greek and Swiss governments have been in ongoing negotiations about this for several years. Greece wants Switzerland to implement a tax withholding scheme for this money, which the Swiss did in similar agreements with the UK and Austria but refuses to do for Greece. Switzerland is also not offering to do anything that would in any way weaken their bank secrecy laws- the Swiss proposal is literally just that the "Greeks should implement a voluntary self-reporting scheme for people with money in our banks, or something, then we will totally follow up on it."
Why am I not surprised?
The anti-Greece/"austerity rulez!!1!1" crowd is getting increasingly desperate to bend the facts to their outlandish narrative.
Yes, I've noticed that many spurious claims have been circulated by mainstream outlets.