Smoothen trek to public transport for seniors

Why are there steps leading up to escalators at some MRT stations, such as Tanjong Pagar? There are also steps leading to the Stevens MRT station.

There is also a flight of stairs at the foot of the escalator linking to the overhead pedestrian crossing near Block 89, Marine Parade Road.

I hope the authorities will convert the steps into graduated ramps so that taking the MRT and using overhead pedestrian crossings will be gentler on the knees for elderly people and those who have trouble walking.

Tan Kok Tim