There are two issues that are be co-mingled and are really separate.
One is the specific money given to kollel students for being in kollel. In the future this might be replaced with grants tied to having served in the army. Non-zionist hareidim don’t accept this money as a matter of principle. While these grants are only for the yeshivos, other subsidy programs assist secular institutions (e.g. universities) who have academic programs covering Jewish studies – and these subsidies tend to be more liberal.
The second is Israel’s liberal social benefits programs which benefit all (hiloni Jews, Russian goyim, Palestinians, etc.) but are especially important for hareidim since one of the benefits is a liberal child allowance, and we have lots of kids. Most western countries with welfare states give such allowances (in the USA its a $1000 per child tax credit). One can argue that Israeli can’t afford the liberal welfare state, but try arguing that in a country where Obama’s economic and social policies would cause him to be regarded as a right-wing fanatic (and note that most hareidi Jews are clearly on the far left of the spectrum on economic matters, which in some way reflects our tradition of meeting human needs first and then worry where the money is coming from).