It shortened the travel time and distance and improved trade.
Jean Jacques Rousseau from his book The Social Contract (1763)
One direct economic consequences of depression was : unemployment. During depression, a lot of business go bankrupt because they cannot afford to pay off their debt. As more and more businesses go under, a lot of people started to lose their job and couldn't afford to support their family
I believe the power was separated so that no one group of people had to much power. It is the basic gest of why we separate a lot of things so that everyone has equality and all power is not going to one person or group who does things in favor of another person or group. The power was then distributed so each branch could help keep the other branch from becoming power hungry and unsociable power feigns.