Look....don't let's read too much into this.
Here is the scenario:
Election 18 months away, you are ahead in the polls (except for your leader) and the crowds are baying for your response on the economy...not criticizing the Government, but something positive from you, without upsetting your supporters.
Answer: take the Winter Allowance from the rich...........you lose no vote, cus the rich won't vote Labour and it is popular with Jake the Peg.
Yes......it is useless, but hey! the first shot in the Battle of the Economy which will inevitably follow.