Yay you finally support Sasuke.
Madara used a jutsu through the Mazou to capture the bijuu which
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. It was him that activated the chains while the Mazou was the medium through which this jutsu was initiated. Since it was Madara casting a jutsu, manga logic has proved many times that the stronger a shinobi is (meaning more skilled, stronger chakra/better chakra reserves, etc.), the stronger the jutsu's effect. Think of Madara activating the Mazou's chains to Tsunade using her medical ninjutsu to treat others via Katsuyu (
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). Basically, since Tsunade was low on chakra, Katsuyu couldn't heal the kages even though Katsuyu has its own power/chakra. Similarly, if Madara was weak, who is to say that the binding chains would work as effectively as they did? Logic implies they won't work as effectively in such a scenario.
An excuse to the Katsuyu/Tsunade comparison might be that it was the chakra from Tsunade's Yin seal that is used directly to heal the kages. Well I have a another example to show you (
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), in this particular thread, I basically prove that Kirikiri mae is casted by Temari through her weasel as a medium but the weasel can only travel through the winds Temari herself produces. Since a stronger Temari is going to be able to propel Kamatari at faster speeds, KKM will be stronger and its strength will be dependent on the summoner, not the summon, even though the summon is the medium through which the jutsu does damage. Moreover, the summoner only indirectly contributes to the damage caused by the attack similar to the Madara/Gedou Mazou situation where the Gedou Mazou spawns the chains but Madara's strength in activating the Gedou Mazou may have an effect on the strength of the chain binding jutsu.
It doesn't make sense that the Mazou with its own power is strong enough to overpower nine bijuu considering the total power of the nine bijuu is much stronger than the Mazou.
OT: I believe Sasuke can beat Naruto high difficulty comparing Sasuke's feats within the latest chapter to Naruto's feats the chapter before, I say Sasuke is the stronger one.