“…my posek told me that its a mitzvah in Israel to not pay taxes if there was absolutely no chance of getting caught…. “
This psak is very distressing. The frum veldt has made great strides in recent years encouraging people to realize the inherent and unequivocal immorality of intentionally taking from others without reimbursing or reciprocating according to the accepted rules. Getting caught or not is irrelevant.
This psak reinforces the prejudiced belief that chareidim are just plain old thieves who have not yet been caught. I would have loved to say that this unfortunate belief is outright prejudice but not truthful, but I see that it is indeed still true.