There are several ways in which political disputes affect the infrastructural development in a country. Let me give you a few examples.
Indonesia is a country rich in natural resources. Economists have made this point many times before. However, there is little or no infrastructure to capitalize on these resources. The main reason for this is serious political problems.
Even in America there has been little infrastructural work done. We need it, but nothing gets done because we have a split government. Think about it. Many countries have bullet trains, but we do not, even though it would be great. Also our airports are second rate, and our roads need work.
If we change directions just a little, there is evidence of bad politics in Congress. For example, 223 million dollars had been approved for a bridge project in Ketchikan, Alaska, which has a population of less than 9,000 people. Why? Politics.
In short, infrastructural project would be great, but no one wants to fund it and everyone wants credit. In the end, little gets done.