I dunno - we're the only so-called 'big club' doing so. Manure had their transfers sewn up months ago - and have therefore allowed them to bed down. So did Citeh. Chelsea were in for Modric - but still had their main business done. Liverpool have been buying for months.
Compare and contrast AFC. We sold our 2 best players weeks ago - sold Clichy before that - yet scramble last minute for players we have needed at least since then, and in the case of Mertesaker - for months.
This is 'arry behaviour at best - and at least 'arry has held on to his most influential player!