As for the idea, basically with all the Shinobi Wars and the Shinobi Villages trying to gain more power than their rival villages and other competition, the Elemental Nations are filled with corruptions from organizations and business owners like Gato and the Akatsuki for example to the Hidden Villages and the Daimyos themselves from Kumo kidnapping people with Kekkei Genkais and unique abilities to Konoha betraying the Uzumaki Clan when it was attacked by Iwa, Kumo and Kiri (While it hasn't been confirmed it is a pretty solid theory).
With the right strategy and planning some one can use that corruption to gain enough funding and power to take control the Elemental Nations and Naruto would be the perfect candidate, because while Naruto is working in the shadows and using the corruption in the Elemental Nations to his advantage, he is using his happy go lucky personality to gain the love and support many different countries.
There are just so many ways for Naruto to grow in power, for example you can have Naruto take control of Gato's company and use Gato as a figurehead while using the corporation as a source of income for his plans, plus while Gato would be valuable to Naruto, he would be far from irreplaceable meaning it would be no major loss nor hindrance to Naruto and his plans if that fat pig dies.
Also, with the Kage Bushin no Jutsu as well as his refined Henge no Jutsu he can train and eventually become incredibly powerful, meaning that he can crush anyone who opposes him when he has to expose himself and take care of any threats on his own. It also helps that Naruto has a fast growth rate and the potential to become more powerful than Hagoromo and Kaguya themselves.
( All credit for this Story goes to Sith'ari)