Equating the regulation of healthcare with "government seizure" is arguing an extreme. Shall we call the regulation of medical practice inherent in Medicare "seizure"? And just how is it that with all the capitalism going on in medical care that we spend the most for healthcare but have poor results compared to other countries with socialized medicine? 
Making a case by bringing up nationalizing food is apples and oranges. But if Caird does not like government interference in our food supply, then let's go back to the time of Upton Sinclair's The Jungle. Anyone care for eating diseased cattle and meat with fly larvae?
When making arguments against Democratic Socialism it is either that the plan can never happen or that one is seeking a utopia. It is neither. It is better than now but even with problems of its own.