Space goes on "forever" because galaxies are accelerating away from one another as observed by Hubble.
You can't walk through brick walls because you aren't strong enough.
Dirt is made of minerals, minerals are made up of combinations of elements, elements are a product of nucleo-sythesis in stars.
No, money shouldn't go to economies that spend more than they make - thats called a deficit, and when it gets very large, there are big problems for everyone.
Many people have donated to African countries where starvation is at epidemic proportions; sadly, however, much of that was squandered by the governments that took direct ownership of these monies. Aid agencies have got smarter about this sort of thing, thankfully, and ensure most of the money is invested directly in self-help schemes, better farming practices, clean water supply etc.