Have done a search and cannot find any evidence linking to Brown and the purchasing of cabbages (or any other vegetable, come to that).
Is the cabbage purchasing to which you refer a nationwide government policy, or did you simply have a dekko at Sarah's basket in Waitrose on Saturday?
If it's the latter I strongly suspect what grocery items the Brown family eat is none of your business, unless you're suggesting Brown, having sold the gold, secreted some of the profit to buy cabbages for his own personal consumption. If this is the case, you have certainly hit upon a controversy and a half. However at the same time, if you go to the nationals with the story, there is a chance Gordon and his family may be perceived as the Bucket family, akin to that featured in the popular Roald Dahl children's novel, Charlie and the Chocolate Factory, later adapted for the big screen - twice - with Gene Wilder and Johnny Depp taking the lead role of Willy Wonka.
In danger of slight digression. However, you will of course remember that the Bucket family ate mainly cabbage soup before Charlie found the golden ticket. To bring the cabbage-Brown-gold story together you will need to start checking the No. 10 doorstep for discarded Aero wrapper imo, or any other indication that Gordon may be searching for golden tickets. If he finds one, then of course the cabbage pilfering will stop.
If it's the former, then I would like to state that I have never received a cabbage from the government. But then again I don't know the policy in detail. What if it simply to inject cabbages into supermarkets; to quantitatively ease a cabbage shortage? Then cabbages will merely appear overnight in our supermarkets. We would be none the wiser of the shortage due to the government's foresight, yet they get no credit for it, due to it being a type of quantitative easing that takes place in the dark, so many people don't see it happening; plus it is an easing involving a not-very-fashionable root vegetable.
A third possibility I come to in trying to decipher your muse (I would, in fact, rather note it a subsidiary possibility under the main theme of large-scale cabbage proliferation) is that the government has used all the money it made from the sell-off of gold to buy cabbages BUT, rather than moving these cabbages about the country in an aid to ease cabbage shortages, is merely storing them under No 10 in the hope that they increase in value, or at least hold their own against the euro for the next 4 months to provide some stability to the economy.
Have done a search and cannot find any evidence linking to Brown and the purchasing of cabbages (or any other vegetable, come to that).Is the cabbage purchasing to which you refer a nationwide government policy, or did you simply have a dekko at Sara