Not only SMBs, advance reservation for Tatkal, rake sharing for many trains was introduced!!! SMBs are still in use in several Garib Rath trains.
Never ways will be initiated to mop up the revenue... Even the special trains are charging Tatkal fares for the same class. Infact many trains are not being regularised due to this fare loss!!!
And what about Premium Tatkal?
Flexi...
more...

fare concept is borrowed from Airlines!! So these adjustments will continue!!!

"...these adjustments will continue!!!' ...
Because no political party or leader is affected. It does not create vote bank to oppose this loot.
But it is immoral and unethical.
Today I read "Bullet trains are for elites, India needs a safe rail system, says E Sreedharan
E...
more...

Sreedharan says he also doesn’t agree that the Indian Railways has made rapid progress. He cites that apart from bio-toilets, there has been no technical upgradation and accident record has not improved either."
So much Govt fancy program runs that benefits not poor

If you are familiar with accounting concepts,
there were British system of accounting... that was adopted in India, obviously...
and there is double entry book keeping more scientific
If govt adopts that system in all govt bodies starting from village panchayat, municipality corporation, legislature and parliament to Indian Railways... all the "WRONG accounting" will be exposed... But they are afraid that Public will...
more...

come to know about their MISDEEDS
So all the Govt spending can be transparent and verifiable. But who will fight for this?
Even Institute of C.A. has not bothered to propagate this idea.