It seems that they believe "need" is the basis of legitimate ownership.
The omnipresence of this viewpoint, even among anarchists, annoys me to no end. It's so emotionally cherished, yet anyone with a functioning brain can see that the fact of scarcity nullifies this as even being coherent, much less possible.
"The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently." - Fritz