As I said earlier, Kromo, unless they have a disability which makes it impossible for them to do so, people unwilling or unable to feed their children (the most basic and important requirement for their survival) should have them taken into care and rehomed with parents who can and will.
This report:
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/184047/DFE-RR227.pdf
was commissioned by the government to examine the whole issue of free school meals. To save you wading through the 150-odd pages, on page 3 (of the document, not the pdf), within the "Executive Summary" you'll find this:
"There was no evidence that the FSM pilot led to significant health benefits during the two year pilot period. For example, there was no evidence of any change in children’s Body Mass Index."
So, no evidence of improved health.
On page 147, among "Conclusions and findings" is this:
"It should also be remembered that the long-term benefits of the pilot (and many of these other programmes) remain uncertain. Whether the immediate benefits in terms of higher attainment or healthier eating habits observed during primary school will translate into higher wages and better health during adulthood, or whether these benefits will quickly dissipate, remain open questions. It should also be remembered that the long -term benefits of the pilot (and many of these other programmes) remain uncertain. Whether the immediate benefits in terms of higher attainment or healthier eating habits observed during primary school will translate into higher wages and better health during adulthood, or whether these benefits will quickly dissipate, remain open questions."
So, long-term benefits not too clear cut either. And even if it was it is parents' responsibility to effect these changes, not the State's.
I don't blame the recipients for this. As I said, if the State offered me free petrol I might be down there myself. This idea was the brainchild of Mr Clegg who, in one of his "hissy fits" decided to fete even more money and gifts on people most of whom do not need it, taken from a revenue pot already under severe strain and relieving parents of the responsibility and the cost of the most basic of duties they should perform for their children.