A leader means a guardian of the people. Whenever the people of a country or region elect a guardian and a leader through collective efforts, that leader should strive for the welfare of the people and the economy of the country. There are countries in South Asia where getting elected means robbery people's wealth. In those countries, once a leader is elected, he prioritizes his personal greed without thinking about the people or the country. As a result, the wheel of the economy of that country does not change. A competent and good leader plays an immense role in making a country economically prosperous.
Personal greed isn't about a region, it's human characteristics, only few with guilty conscience remember what brings them to the office to serve the people. It's so sad that drying election, they win the heart of the people with manipulation and outcry about the current state of the economy and showcasing how bad the current administration is bad for them but as soon as they take over the office, they continue the same thing the previous people are doing, sometime even worse.
Whenever an elected representative thinks about the country and thinks about the people of the country, good work will be done by him. In simple words, if the leader is corruption free then the country will be corruption free and will reach the root of development. On the other hand, if the leader or leader is corrupt, then the economic condition of that country will also be corrupt.
I personally has come to a conclusion that the only person that can give a good leadership is the man in heaven, man will always be a man. If we want a good leadership, it can't be possible because if the president has good intentions of good leadership, the governors might be crooks and so the senators and many more governments parastatals. Good leadership go way above just one person, it's start with everyone.