Who is to decide what items are essential and what things cannot be bought with a "welfare card"? If a government minister (IDS?) draws up the list in the same way as Michael Gove is tinkering with the national curriculum, it will inevitably turn out to be a hugely expensive and massively inefficient disaster.
As for stigma – kids with free schools meals in the days when they had to admit it in the classroom were stigmatised. People with milk tokens were stigmatised in corner shops. British society would win a sneering contest against the rest of the world, hands down and this would provide those already seduced by talk of scroungers and hand-outs the perfect opportunity.
By the way, as a landlord may I point out that it isn't all that easy to chuck a non-paying tenant out of "their home". The one I have just got rid of kept half his housing benefit for other purposes and owes five months rent which, of course, I shall never see. (He also wilfully damaged the house.)
Instant coffee….advice needed.
The King's Speech To Announce 'All But The End Of Leasehold System' System'




