Yes of course religious people only have kids because they just want those government subsidies, not because God told us to "be fruitful and multiply"
Also I was almost exclusively talking about a specific group in Israel:
50% or so of ultra-Orthodox men in Israel do not work (instead they spend their days studying religious texts or something…). They have massive amounts of children and are supported by the state and/or their wives (78% of whom do have jobs).