Why would The Master (or Kathy, for that matter) need this when they can use a fully-mechanized mobility cart, with a seat, FOR FREE at Wal-Mart, Food Maxx, and a whole host of other forward-thinking, customer-oriented retail establishments?
I will grant you that the little tabletop attachment at the top of the walker could come in handy, but I think the basket on this unit looks much smaller than the ones on the mobility carts. That would hinder George's ability to load up all of the items he needs to purchase. Besides, folding and unfolding this thing, let alone pushing it around in a store - and then carrying it up the stairs to his apartment every time he needs to take it out somewhere - would require WORK! You shouldn't expect The Master to expend extra effort when a more practical and efficient solution is already available when he walks into the store.
Ol' Gerry is sure that your suggestion was well intended, but I don't believe it is a good solution for George at this time.
Do the words "Food Maxx Crone™" mean anything to you? STFU!
George may be disabled, but he is his own person of disability, and naturally will take steps to be more independent in his disability. I am sure if you went to George's apartment, you would find a selection of canes, walkers, baskets, etc...all designed to minimize his disability. Plus, if you think about it, what good is it to have a handicap if you don't look like you have a handicap?