@Retro:
-Wow did not expect that deep bit of logic coming from Donflamingo of all people. This guy slowly looking even more dangerous then he appears.
Didn't really surprise me, given that Donflamingo is easily the most competent/reliable of the Shichibukai when you give it only a minute's thought (at least in the post-Crocodile roster).
Where the other Shichibukai are either random brawlers with small entourages (Kuma, Mihawk, Jimbei, Blackbeard) or backwater despots with iffy military might (Hancock, Moria), Donflamingo is the respectable head of a very profitable worldwide criminal enterprise, the operation of which he personally oversees. He recognizes good investments, allocates his capital well, and is able to send many of his precious financial resources the WG's way in exchange for a little morally bankrupt back-scratching. He shows up regularly to meetings (I haven't seen him miss one yet) and for all his hyperbole, he's usually more or less on the same page with the WG's immediate goals. He might make the guards outside the meeting room fight to the death every now and again, but he hasn't really done anything to actively SABOTAGE the WG's agenda the way pretty much ALL of his peers have save Croc.
He's rich as hell, obeys orders, and he doesn't bite the hand that feeds him. Now THIS guy was a great hire. His co-workers, on the other hand:
Mihawk is a jobless bum who never shows up to meetings and spends all his time one-shotting low-tier pirates on his dumb raft and getting roped into happy hour with Shanks. He's not a master swordsman, he's a griefer in an MMORPG. He goes around looking for lowbies to kill and logs off the minute he finds a real challenge. He threw one slash out for shits and giggles to see if Whitebeard would blunder into it, and since it failed, he's probably going to be smoking out on the loading dock for the rest of the war.
Moria only just now started showing up for meetings and he's a lazy bum who relies principally on minions to wreak any kind of havoc on demand. What's he gonna do at Marinford besides stand around and laugh like an idiot, unless somebody decides to take a smoke break mid-battle while casting an especially long shadow? He hasn't contributed anything yet except yammering about people he'd really like to turn into zombies.
Hancock never shows up to meetings and she has a nasty habit of turning almost everyone with a penis into stone when she does make an appearance. Has begun actively sabotaging the WG's plans because she fell in love with a stretchy kid who reeks of meat.
Kuma shows up to meetings and acts like a loyal lapdog, but he has that really, REALLY obnoxious habit of giving free vacations to people he's explicitly told to capture/take down. Superpowered cyborg pirate or not, that's grounds for friggin' dismissal if ever I heard any. Sengoku or whoever's in charge of HR at the WG needs to man up and drop the hammer on these insubordinate slackers.
Blackbeard is already proving to be the World Government's worst hire yet. He's shown up for one meeting only to immediately commandeer company resources and run off to Impel Down for no apparent reason, and in all likelihood he's going to show up late and turn the entire island into a black hole just for the hell of it. The only thing he's brought to the table so far is Ace in chains and all the headaches and earthquakes that follow.
Jimbei pussed the hell out and went to sulk in prison until Luffy broke him out to lead an army of fish against them. No, seriously, I know the WG needs some kind of superpowered pirate leverage against the Yonkou, but surely they can find more reliable help than these lazy jerks? Why not give one of the Supernovas a ring? Surely Capone or Kidd or Bonney must be in need of a little extra pocket change out there on the Grand Line!
And for his prudence, Donflamingo's probably going to walk away richer than ever when he hocks war memorabilia on the One Piece equivalent of home shopping networks. Man has a head on his shoulders (as well as a gigantic feather boa that makes him look fruitier than Bon Clay).