This was an excellent rule; but it was carried so far that in the end it led to a change and certainly to an abuse in the political system.
First the censors, after having for a long time claimed the right of transferring citizens arbitrarily from one tribe to another, allowed most persons to enrol themselves in whatever tribe they pleased. This permission certainly did no good, and further robbed the censorship of one of its greatest resources. Moreover, as the great and powerful all got themselves enrolled in the country tribes, while the freedmen who had become citizens remained with the populace in the town tribes, both soon ceased to have any local or territorial meaning, and all were so confused that the members of one could not be told from those of another except by the registers; so that the idea of the word “tribe” became personal instead of real, or rather came to be little more than a chimera.
It happened in addition that the town tribes, being more on the spot, were often the stronger in the comitia and sold the State to those who stooped to buy the votes of the rabble composing them.