al-Mu'tadid
... that the Caliph al-Mu'tadid managed to halt the decline of the Abbasid Caliphate during his reign, but at the cost of a huge bureaucracy and some 80% of expenditure going to the army?
... that the <a class="mw-redirect" href="./Caliph" id="mwC2Q" rel="mw:WikiLink" title="Caliph">Caliph</a> <b id="mwC2U"><a href="./Al-Mu'tadid" id="mwC2Y" rel="mw:WikiLink" title="Al-Mu'tadid">al-Mu'tadid</a></b> managed to halt the decline of the <a href="./Abbasid_Caliphate" id="mwC2c" rel="mw:WikiLink" title="Abbasid Caliphate">Abbasid Caliphate</a> during his reign, but at the cost of a huge bureaucracy and some 80% of expenditure going to the army?