I'm okay with that if this person is doing well. There is plenty of examples in business when one person successfully leads big corporation for years. IMO leading country is like leading extremely huge corporation.
Nowadays I think we just don't have any feasible candidates who could substitute him that's why he still rules and who knows how long it gonna last.
And why you don't any feasible candidates out of 140 million population?
Because either they don't have a chance do get there or they just don't want to meddle in politics. Same is US, there could be much better candidates for the presidency out of 318.9 million people.
I don't understand what's wrong with 50 people controlling 80% of wealth of the country? And btw most of them are Putin's close friends.
This money is gained from selling natural resources (that btw belong to population) or from some other sources that I'm not gonna touch here. And it's spent for their own need when could be invested to industry and high-tech development.
Just check this and all questions will drop out