Yes, food shortages are going to be a reality very soon, because the banks control the letters of credit (LOC's) for food suppliers/shippers/distributors, and these LOC's are becoming more difficult to get the banks to issue.
Shortages on the shelves are likely to be reality within a couple of months as the LOC shortage accumulates and stocks pile up rotting on docks/storage facilities.
See LaRouche on this:
www.larouchepac.com/node/11837/print
True and frightening