I see, you haven't really answered what I was looking for though, so let me ask some more detailed questions: What year are you now? How much of each of these fields (various philosophies, economics, science)? Have you taken upper level classes (3rd + 4th year) or lower level classes (1st and second year)? Do you have any graduate studies experience? In what? That kind of thing. The reason this is important is because the experience of a first year philosophy course and a fourth year philosophy course is tremendous. Most lower level SS/Hum courses are extremely broad, boring, and completely lacking in detail. In Philosophy this is particularly the case, purely because of the odd way philosophy is structured (which is why I've decided not to pursue a degree in it myself). You're very much jumping into a conversation in progress and it's almost like you have to learn the entire history of philosophy before you can even begin to comprehend most modern philosophy. This is less so for newer sub-disciplines such as the philosophy of science, but still true none the less.
On what you've said though, I can see a few problems in your thinking. Not logical problems per se but problems in the way you write your thoughts that make it difficult for other people to respond to you, for example above when you say "How does productivity increase? The answer is in science." This is a problem because you fail to define science and you fail to define productivity. What this sentence conveys is that science is equivalent to anything that increases productivity. If I were to make the argument that economics increases productivity as well, that would be easy to back up, you could easily say that, well, that's because Economics is very scientific and is based on empirical evidence and mathematics. And that's all true and very good, but it doesn't add anything, and eventually becomes a tautology.
Another problem is that you seem to be confused about what exactly Humanities are. I've never known a University to consider Economics a humanity, that's a social science. As is political science, sociology, etc,. I'm a social science student, not a humanities student. Philosophy, Languages, History, etc,. are all Humanities and are not social sciences.
If I might infer, these kinds of mistakes are the kind that you study in the Humanities. Critical Arguing and Critical thinking. And from my own personal experience, for whatever that's worth to you, most pure natural science students are quite incapable of making critical arguments or studying language in any degree.
Oh no, I completely belong in social sciences. I do like math, and all sciences. I find them more difficult though, probably because I spend so little time in them compared to poli sci and such. And it seems to me that increasingly, the aggregate of human knowledge is becoming dependant on increasingly complex mathematics. Perhaps Asimov's psychohistory is the future.
Just my thoughts.