Gavra: Certainly there is no inherent right to subsidies in the abstract. But there is an inherent right in a democracy to be treated fairly by the majority.
And when the majority goes against its usual values specifically to target a disliked minority, that is unfair.
I would have agreed with you if not for the fact that the generous subsidies were put in place by the Charaidim in past years to funnel money towards their own at the expense of the rest of Israel (FYI, the settlers have the same issue).
Second, I’m not certain that supporting children is the “usual values” of the Israeli state. The Kibbutz system (which IMHO would be fair to call “usual values” of the Israeli state) has/had group raising of children and the children working towards the needs of the Kibbutz. This is certainly true when those with large families overwhelmingly would replace the state if possible (both the Arabs & Charaidim with a Theocracy). If anything, the state has the responsibility to promote values held by the state.
(Of couse, this is the “liberal democracy” argument, not the actual or Torah point of view.)