Most human economic activities are influenced by the need for money. But why can anyone not become rich?. What are the reasons why others work hard yet they are still poor? Why can't we print enough money for everyone? Questions like this do appear but there are reasons the answers are opposite.
That's what probably the governments of the Republic of Zimbabwe thought. Long story short - printing money will lead to a hyperinflation, if a certain country is poor due to shitty economical system, export, tourism and so on (meaning no one else needs their fiat currency or products) they can't change the situation by printing money, or making salaries higher without serious assets behind all that. It would be nearly the same thing as hiding all the mess and trash in your room into different closets to make it seem tidy instead of cleaning up the mess de facto. There's another reason for that issue - it's corruption, that takes place in the most of developing countries, it actually crushes the economy. Due to corruption less people can develop small business, which is a good index of successful economy, people also immigrate to other countries with more opportunities, due to less developed business and lack of qualified labor the quality of the goods produced declines and thus people buy import production, but not their national and so on. The only way a certain country can become successful is actually people in the government stop being so greedy and unfair.