Is traditional Varnashrama Dharma a Necessity?

In today's world there are so many voices, public opinion disregarding the traditional Caste System of System.
The traditional Caste System of india ; in Sanskrit is called as the eternal Varnaasrama divisions of the Society into- Brahmana, kshatriya, vaishya,sudra, brahmachari, grhastha, vanaprastha, sanyasi.
Why were these divisions made? Who made thise divisions? Are these divisions really required?
Sri Krishna(The Supreme Personality of Godhead) himself confirms in his Bhgavad Gita:
" I had made these 4 divisions i.e Brahmana, Kshatriya, Vaishya, Sudra on the basis of his natural inbuilt character(Gunam) and Karma i.e his actions."
The Term Designations itself is not something Bad. Even in today's world we find these natural designations automaticaly exists i.e Warrior Class of Men, Consultants(the Intelligent Class), Business Men, and the Working class. No any organization or any unit could function without these 4 divisions or even 1 class of people. Imagine if there are no military trained people to protect our country! Imagine if there are no people who are engaged in cultivation of Food crops!
Since in todays world there are very few  Brahmanas(intelligent class of men who are expert in guiding people according to the direction of the Sastras- Vedic Literatures) society has fallen into Chaos. People are being misled by the Politicians promising a better Living. The Sanity of the Population has degraded, Corruption, violence, Quarrel, wars is now a natural thing everywhere. Relationships do not last longer, The Life duration of people has reduced. The Common Men are constantly disturbed by natural disturbances in the form of Earthquake, severe Diseases, drought, Floods etc.
Krishna had only made these natural 4 divisions which is an utmost requirement for the peace and prosperity of the world.