He's thinking big picture but not I thinkby sacrificing himself to Dofla.
From the tome of the void century the Marines were put in place to prevent something so catastrophic from happening and the Celestial Dragons where one of the major tools they had to maintain the old ways.
At some point this got too much for the pirates and the declined being part of the system anymore and the Marines had a second ftont.
The grearest Pirates of the new age took over vast tracts of the OP world and changed things again, being too strong to crush and becoming their own territories by default.
MThe WG figured out that by creating the schicibukai they could face this problem. Seven very strong Pirates that work nominally for the WG by thinning out the herd of lesser pirates at the cost of supporting the WG.
Now they face a huge backlash having moved to pick off and destroy one of the Yonkou, no doubt at huge political cost.
And their special weapon the Sichibukai is porving less than effective; 2 defeated outright by a starting pirate and two that seem to support him. And Blackbead imnediately slipped his leash and went to be a Yonku. For everyone they are foced to replace the less in control things look. Especially now with Law warring against Dofla.
And now Doflamingo is pulling his own crap, targetting both Luffy and Law the 7 warlords are starting to look a liability.
This perception won't show a political systen in control, even without thrme rise of Revolutionaires.
And the Celestial Dragons themselves, degenerate as thy may be are still one of the highest priorites necessary to the WG. aAnd now it looks like one may fall. So everyone's upset the system is crumbling furter and without control.