Actually they are subsidised by teritary students
Here how it goes, SBS makes svs serving NUS and NP/ SP
progressively to go NAC, from here, they can cash in more profits
because the bus stamp system today is to their advantage as there
is only the aircon rate stamp. From here, they go subsidise those
bus svs that have brunching of buses reguarly cos at the end of the
day, the managers at SBS only bothers abt the revenue collected per
qtr