Nechomah
…let’s say 1 spouse works officially and the other either learns or works unofficially…
That’s quite a euphemism.
At the end of the day if anyone thinks that cheating the government of any country (and especially Israel) from legally due taxes doesn’t leave a stain on your soul despite any justification, then you are not being honest.
And I include myself in this even though I pay all taxes and everything is on the books and i will not hire an illegal cleaner or not pay her bituach leumi. i have also refused the tefilin seller’s offer to keep TEFILLIN off the books as I refused the Talit seller to keep the TALLIT off the books when I got married and I refused the invitation seller to keep the inivitations off the books. But even I have justifications once in a while and I am not proud of them.
I will also say that in my opinion living in Israel and not participating in the country’s ups and downs, mocking everything and disparaging everything – is also not good for your soul’s health despite whatever halachic or hashkafic viewpoint you have. We are not meant to be bitter isolationists.