I understand you don't like the country, which is entirely your right. This may explain why you seem to live now in Geneva, which is no doubt much better suited to your personality.
The largest foreign resident population is Portuguese. The French population is made up overwhelmingly of border crossers, which is what makes Luxembourg such a wonderful place on the weekends, i.e. when the French have gone home.
Another point: salaries.
Salaries for senior roles might be quite similar (i.e. a banker with EUR 120k in Luxembourg might get CHF 130k in Zurich). Bear in mind that in any case while taxes in Luxembourg are lower than GE/FR/BE, those are still higher than in Switzerland and you don't have Zug and all that stuff.
But for entry level and low-skilled jobs the situation is very different.
Low skill:
Luxembourg has a minimum salary of around EUR 2000 brutto.
Switzerland has no minimum salary but an unskilled job might be around CHF 4000.
For a frontalier working in Geneva VS Luxembourg it is clear the difference.
Entry level, I put a PDF there
Many entry-level (university jobs) are around EUR 3000 brutto. Bear in mind also that other than lawyers, there are not that many high-paid professions in Luxembourg (i.e. investment banking - that is in London -, management consulting, etc.) Luxembourg is most back of house, engineering, construction, etc.
In Switzerland for those many entry-level graduate jobs are easily CHF 6000 brutto a month (and obviously Management Consulting, Investment Banking, etc. are higher).
So again a no brainer.
We get it, you don't like Luxembourg.
But otherwise are you so entirely wrong, I don't even know where to start:
- Switzerland has no minimum income? Really?
- there are no high paid jobs in Lux? Really?
- Show me a senior banker that makes 130k CHF in Zurich...
It's ok, you made some bad experience, we get it. But the OP asked for factual advice and your "facts" are simply wrong... or completely biased as you are exclusively looking at the income part and not the living expenses. You lived in Lux center and probably in some expat bubble as your information seems completely off from the reality I grew up with and see every time I go back every few weeks.