One country one cast
Honor killings--When a guy from one caste marries a girl from some other caste,there are a lot of cases reported about honour killings..This can be stopped only if all the people of one religion has one caste...
Communal riots--These will reduce drastically because the only communities that would exist would be based on religions and languages.
Citizens are not united as Indians but rather divided on the basis of casts..This problem will also be solved..
Gujjar agitation,patel agitation and so on demanding reservations will not be seen as everybody belongs to the same cast..
Easy to get brides and grooms--
There are a lot of people who get married at a very late age because they do not find brides and grooms in their community..This issue will be automatically addressed if people have the same caste..
There would also be some challenges if the govt tries to implement this --
There are people who only grow up thinking of govt jobs and other facilities on the basis of reservations.
There will be a lot of people who will think that they will become lesser humans because they belong to upper castes..
There will be political parties who will try to make issue out of nothing..
The possibility I believe is that the PM or addressed the nation to give up casteism and convert to "one nation one caste " and that caste would be "bhartiya" ..All the citizens of India will have only one caste irrespective of religion...
If such is a motive..I will be the first one to convert to "bhartiya" caste more