Frankly, the Mashal is insulting. Nobody claims that other should do their work for them while they sit back and relax since they will one day be Talmidei Chachamim. Nor does anyone claim that others should shoulder their share since the ARE Talmidei Chachamim. The country from its inception – as decided by the secular leaders – recognize that one who IS learning is at the very least sharing the burden – if not carrying the lion’s share. (This, by the way, is reflected in the laws of a democratic country. Does anyone think that the Chareidim are “controlling” the Israeli government? That smacks of general anti-Semitism.)
Furthermore, the Mashal feeds the dangerous and libelous assertion that Chareidim are “parasites” who contribute nothing to society, but rather expect that, as their due, others should slave away for them. This utterly ignores many inconvenient truths, such as the fact that the overwhelming majority of Chareidim work and pay taxes, and that they run hundreds if not thousands of Gemachim from which religious and secular benefit alike.
A more apt Mashal would have Nachum humbly and graciously performing his chores along with his siblings, only to have them claim that he deserves to receive nothing but stale bread and water since he does not bring any money home.