No, I'm married and wife doesn't work so taxes are much lower for that case. In addition, in Flanders it's true that taxes are very high but it's also very common to get a lot of 'tax-free' benefits. So after all if you take all that into account, it's as if you would be paying much less taxes. I end up paying something around 30%, not 50% as people thing.

But I agree with you that taxes in CH are much lower and salaries higher. At the end of the day a lot more is left. Just that the difference is not as huge as people think.