You got the wrong idea. I don't think anyone idolizes Tony. It's a great movie and Tony is a great character and Scarface tells an interesting story, not because the protagonist made himself rich. Same as Godfather, I like it and I like them not because they are rich, but it was because they made interesting choices. Let's talk about Scarlett in Gone with the wind -- was she rich? Was she poor?
Recently, I listened to Shit Town and it gave me an everlasting impression on me. The main character in the story was a very poor man. I liked him -- not because he is poor either, but because he is interesting.
Who cares about whether the character is rich or poor, the character's background is merely a medium to tell the story. Being very rich or poor or desperate is just a convenient choice to get the story flowing because the characters in such extreme circumstances tend to have interesting experiences and choices.