Legit or is it a scam is a good question. This is far from being a clear cut matter.
You pay tax to Switzerland but you are still required to pay social security payments to your native country, if you want to receive benefits. Switzerland is happy to take your tax payments but they will not give you anything in return. Why would they, you do not work in the country, you have no residence there and are entitled to zip.
To answer the question: Captain, Married, two kids 1-5%. Reality is about 800 to 1000 Eur a month less than before.
Has Wizzair managed cleverly to distribute it's own taxes for it's employees to shoulder?