Why? Did the Swiss force her to take out a loan in a stronger currency? Is it the Swiss' fault their currency is doing so much better than the zloty?
Sounds like she needs to take it out on her own central bank.
O.K. Have it your way.. then she should be pi$$ed at her bank..
My point is you usually "fight" against those that pulled the rug out from under you rather than fold up your tent and die.
In this case the Switzerland central bank unexpectedly removed a cap on its currency. WHY? Probably because they estimated what that would mean in additional interest profit.
That pesky word "unexpectedly" rears it's ugly head once again.