The GPL does not say you can't charge for software. You can charge. Someone else can take your source code and give it away for free. All is fair.
Titan is the only moon that is known to have an atmosphere of significant composition, which in this case is almost entirely nitrogen. The cloud is about half the size of the United States, and the images are astounding."NASA's Cassini spacecraft captured the image of the 1,490-mile-diameter (2,400-kilometer-diameter) cloud on December 29, 2006. The cloud's presence fits predictions that Titan has a "methane cycle" similar to Earth's water cycle, with bodies of liquid methane evaporating and forming clouds that rain material back down on the surface.
Here is the goverment page regarding the fee and its non-taxable status:
What you're asking for is a proportional representation system. The downside of such a system is that you lose the geographic link between the voter and their representative. In a small country such as Israel this might not be such a big deal, but in as geographically and culturally diverse a country as America it probably would be.
There is also the fact that coalition governments aren't as stable as majority ones, which means that there would be more elections, which most people probably don't see as a desired outcome.
As far as we can tell, the theoretically best voting system is probably the Single Transferable Vote system used in Ireland, Malta and some other places. But it's complex and would require either way more elected representatives, much larger voting districts or some combination of the two. I'm not going to even try to explain STV. There must be a decent wikipedia article on it.
You could use any of these voting systems (or any other one, even randomly electing people) to elect your representatives and still have a parliamentary system.