[garte]

1. As long as these are measured they are not a problem: Switzerland - and most of the EU countries - do simply not have a problem with poor people leeching the welfare systems, but rich people not paying their share: tax evasion by the rich is a problem going into the billions while social security fraud is around millions.

2. That's also measurable by crime stats and Switzerland is really tough in re-patriating people that broke the law.

3. That is something you cannot measure and where you cannot guarantee freedom or fairness in a society. What if I were to deem you too stupid to vote because you're advocating for a fascist mindset that might overthrow the democratic fundamentals? You wouldn't want that, I suppose.

So there's nothing to be done that's not already been done.