Individuals have to be in charge of their own survival. If you do not take the steps necessary to support yourself, then why should everyone else have to pay for your laziness? Likewise, you do not have a basic right to other basic needs like shelter. If you do not have shelter the government doesn't owe you a house.
Now, for the events out of your control, there's disaster relief/ insurance and welfare. I don't see why more is necessary.
And besides, under the current capitalist mode of agricultural production, we have seen greater gains in food production, and greater reductions in hunger, then in every era before it.
In fact, in the last century, among the capitalist nations there were no major instances of mass deaths due to famine or hunger. In fact, all the
major instances of famine took place in centrally planned countries.
Fundamentally, the system is good. Everyone works independently with pricing as a coordinating tool.