A sharp slowdown in Woolworths Foods sales has exposed the financial strain of the middle class, sending consumer shares lower and challenging premium grocery spending.…. Enter your email below and we'll send you a one-time pin to log in. {JSON.stringify(article.attachments[0], null, 2)} --> A sharp slowdown in Woolworths Foods sales has exposed the financial strain of the middle class, sending consumer shares lower and challenging premium grocery spending.