The ACTUAL COST IF RUNNING NON AC SL COACHES IS ALMOST EQUAL TO AC ONES, EXCEPT AC POWER LOAD AND VALUE ADDED SERVICE OF TOWELS, BED SHEETS, etc
In Real Life Situation, this will work out SL Class at the fares of 70 percentage of present 3AC Fares.
Now...
more... Politicians won't be happy for such a HUGE HIKE, All this vast Difference is only due to Railways not hiking non AC fares much due to concern for poor people.
Just Consider Starting a Transportation Business by running Buses, you will understand the Actual costs.
For UR people, Railways must run MORE DAILY JAN SADHARAN TRAINS in Several routes, but if you want Reservation facilities, you must be ready to pay AS PER ACTUAL COSTS. Because when you demand reservation, you are asking the RB to arrange a Dedicated TC for say, 3 coaches, then the RB needs to arrange for the Salary of that Extra TC also. Staff Cost is one of the Huge Portion of Railway Expenditure. Any private company won't pay anything near to Government Railway job.