Not desperate, but sensible. If they are after another established striker it means they are not resting on their laurels, and realise that this is a once in a lifetime opportunity to win the league (or at least qualify for the CL). Without a decent backup, an injury, suspension or loss of form to Vardy could undo all their good work.
I wish we had had the same attitude a year ago, when we were a backup striker (and GK) short and otherwise could have had a decent shot for top 4.
This.