softwords: Unfortunately, koldmamadaka had a point. Many chareidim view non-chareidim as second-class Jews. Even in the USA, many yeshiva guys view working people as second-best (until it’s time to get married, and they need a wealthy father-in-law, of course!)
You also write of “the sacrifices that Bnei Torah make to preserve Torah and Mitzvot in Klal Yisrael”. Yes, they definitely learn, but I wouldn’t say they “preserve” Torah for the Jews! There are plenty of non-chareidim (or even chareidim who don’t learn full-time) who learn Torah and do mitzvos! “Preserve” means that without them, Torah and Mitzvos would be lost. That is definitely not true!
You say these people are sacrificing their entire lives to protect the continuity of the Jewish people. How did you arrive at that conclusion?
The fact is that it’s brought down in many places that a person is supposed to support his family. Im ein kemach, ein Torah. It says that someone who only learns and relies on charity will end up becoming a thief. Unfortunately, this can be seen in Israel nowadays, where thousands of chareidim lie about being full-time learners in order to get a government check. I remember Feif Un telling me a few years ago about a story with a kollel guy who had children and no money. He got caught shoplifting.
Men are supposed to work to support their families. Claiming that learning full-time “preserves” the Jewish people is wrong. It actually distorts what is proper in Judaism.