Between DMG and PSP there is no comparison after devolution. A DDOR is a pitiable job. You collect revenue from poor farmers who have got nothing to pay. Decide some cases about revenue matter. A couple of Tehsildars and an army of patwaris will keep on greaseing their palms and making DDOR ultimately responsible. As for as DCO is concerned It takes fifteen years to reach there. and now keeping in view the provincial autonomy more and more officers from provincial management are being appointed on this post, particularly in Punjab. I believe that a DDOR can't even be compared with AC Income Tax(Job of both of officers is revenue collection, one under Federal jurisdiction and other(Agricultural) under Provincial Jurisdiction). How ever it is better for DMG when they are working in some secreteriat or Federal Institution. If DMG is One Down preority in CSS it's reason (as already explained by many friends) is that they are waiting for good times when they would be able to exert some influence on a weak political government to undo the Local Govt.