He believes this is the way things are done in your "civilized" world, and this is why he cloaks himself with these legal justifications for every action.
Putin and his allies fill their pockets, live in opulent mansions and palaces, keep their mistresses in luxurious apartments in Moscow or Switzerland, send their children to study abroad (although they should not be able to pay the costs of such an education from their official ministerial revenues).
The army and the secret services receive a large part of budget, but without any oversight (some of it is not disclosed to the Duma, even though it's a puppet parliament) these funds are wasted by corrupt officials.
At the same time millions of Russians live a short and miserable life in subhuman conditions, without running water, literally sh*itting into buckets, entertaining themselves with alcohol, crocodil and tales of "Russia strong". While swallowing buckets of primitive propaganda (and moonshine) they are being robbed of their potential wealth, health, future.
With its massive resources Russia could be a civilized, prosperous country that provides its citizens with ample opportunities. Due to corruption of its government, lack of oversight from democratic institutions or free media it quickly becomes a third world state that educated people flee in droves.