[skore]

No, the "fair share to society" is determined by the prevailing morals of society. You can make laws all day, if society doesn't agree with them, you run into problems (ask some leaders in the middle east).

Imagine a town at a lake. There is a law that all citizens can only take so much water out of the lake. Now there is a guy taking a lot of water out of the lake - to the point where he steps over the law. But wait! He is actually registered as the citizen of a different town! Phew. Law abiding citizen after all.

What happens is that some corporations extract more value from society than is healthy for that society. That they have so much money that they can bend the tax code to their will without breaking it is completely besides the point. The result is the same: They have a net negative effect on society. That's not fair.

The lake of the town is being sucked dry. Just look at how much money those Double Irish corporations have in their accounts while a lot of of countries struggle to pay their public employees and have to make drastic cuts that directly affect pretty much only the middle and lower classes. That's not fair at all.

Well, at least they can keep buying those iPads on credit that will ruin the rest of their lives.