berlin: What “such large” tzibur? The percentage of Jews engaged in fulltime learning is extremely small. It’s historically been much larger. Less than 10% of Jews are frum. And less than 10% of frum Jews are engaged in fulltime learning. So much less than 1% of Jews are engaged in fulltime learning. Hopefully we can significantly increase the percentage of fulltime learners over the next number of years.
And the Remo and Shach do say you can make a career in Limud Torah while living off tzedaka.