Ubiquitin, the CI obviously made that statement over sixty years ago. Therefore, by stating it as a need for now you are sixty years behind the times.
Akuperma, being that you frequent Boro Park I suggest that you pay a visit to Rabbi Prof. Israel Kirzner. He can certainly give you talk on Keynes and Hayek. In any case, not everyone can open a store in Williamsburg or Boro Park. Even those who do need to be able to communicate in English. Math trains one to think analytically. In fact, Rambam says at the beginning of the Guide that Math and Physics prepare one to learn Troah. Both Rabbenu Bachya and the Gra say that if one lacks knowledge of secular fields he will be lacking 100 times in Torah. Rav Kook explained that a person who lacks secular knowledge will not be able to explain Torah to people.