The power – separation theory implies that when the legislative, the executive and the judiciary work independently and do not interfere with the working of one another, we call it power separation. The power-separation theory asserts that no organ of government should interfere with the workings of other organs.

This theory encourages decentralization of power. It checks arbitrary rule, it protects individuals’ freedom and rights. It enables us to utilize the abilities and experience of so many persons. In spite of all these good points, the power-separation theory is neither practical nor desirable due to the following reasons :

1. It is an undemocratic theory: 

In modern time, the development of democratic ideal has given birth to the concept of welfare state. It has increased the workload of the government, and people’s expectations. In democracy, legislature represents the public will. Many times, the power separation theory creates a hindrance in the working of the legislature. 

2. Confrontation among different organs of the government: 

Power separation theory gives birth to internal struggle among various departments of administration. If all the three organs work independently, there will be decrease in the pace of development. Each organ of the government will take interest in protecting its powers. So, for the running of the government, mutual co -operation and mutual balance among the three organs of the government is very essential. 

3. Not necessary for freedom: 

Power-separation is not essential for the protection of freedom. 

4. An unscientific theory: 

The organization of a government is just like a human body. In human body, each organ depends upon other organs of the body for its healthy functioning. To conclude, we can say that the organs of a government: the legislature, the executive and the judiciary cannot function separately and independently. Therefore, the theory of power-separation is neither practical nor desirable.