Really, very few of the problems we're facing can be explained by not spending enough; rather more can be explained by spending too much with no regard for what we get for our money, then letting people say "well, we just need more money to solve that problem".
If only we used an economic system whereby we actually accepted and utilized feedback about how our money was being spent, instead of spending our time demonizing the very idea that one should be permitted to examine the question of what one is getting for one's taxes, and simply being told to shut up and fork more over. Alas.