“All the tzadikim supporting the Bnei Torah are giving the money voluntarily”
This is not true. The Israeli government provides stipends to yeshiva students through tax revenues. And in the US, yeshiva students are potentially eligible for Pell Grants, also funded through tax revenues.
As a big spending liberal Democrat, I don’t have a problem with government spending on good causes such as this. But you should not pretend that everyone is paying their taxes voluntarily or that all taxpayers are tzadikkim.
(Do I get mitzvah credit simply by being a US taxpayer because a small fraction of my tax dollars goes to support yeshiva students?)
“The Rambam is unequivocal. He absolutely forbids to live on the proceeds of learning Torah.”
rabbiofberlin is correct. While many other rishonim disagreed with the Rambam — and it would be sufficient to cite those sources — there is absolutely no question about his opinion in this matter, as the quote from rabbiofberlin shows. You can look up the original in Hebrew; the translation here is accurate. How can those who distort the words of the Holy Rambam call themselves Bnei Torah?