Even in the worst case, there is something called ETHICS sire which is never followed, If I have to be harsh. They have decided the fate of the SL class to remain same for ever. Those who plan well in advance are never benefited. Numbers of availability is sometimes like a mirage.
Although I had mocked in my wiritings in a way to increase revenue, IR would surely look forward to add some surcharge if the BP is changed. Nobody knows. When ERF is charged, why cant they do it for BP change?