Also, please name some of “all the Gedolim in Medinat Yisrael” that support it there as well as where they wrote this.
Rav Shteinman, Rav Chaim, and L’havdil Rav Elyashiv and Rav Ovadya Yosef ZTL, to name a few. It shows in their votes (via Shas and Agudah), which are well documented.
You can argue that it is different (for example, Rov Yisroel in Eretz Yisroel), but you can’t argue that a true welfare state (single payer, minimum guaranteed income) would be a boon for Kollel Bochrim in America and increase Limud HaTorah.