Full Idea
Many philosophers (e.g. Rachels) have argued that there is no morally relevant distinction between killing and allowing to die (or the related 'acts and omissions'),..as in not sending food, or sending poisoned food. I disagree.
Gist of Idea
It is not true that killing and allowing to die (or acts and omissions) are morally indistinguishable
Source
Philippa Foot (Killing and Letting Die [1985], p.78)
Book Reference
Foot,Philippa: 'Moral Dilemmas' [OUP 2002], p.78
A Reaction
It appears that some omissions are worse than acts. It is more honest to just shoot an injured person, than to walk away and leave them to die. A range of cases.