Next time they will charge for aisle and window seats. 
What the extra cost to them?
Zero.
Next time they will implement ERP when you get off your seats to
move about.
Next time they will charge you for toilet usage, by every 5
sec.
So now it doesnt matter if you are elderly, disabled or child,
as long as you pay the extra charges, you can have the seat and no
need to help with the emergency door?
anyway i already boycott SIA long ago, because they treat local
as lower class customer.
Whenever i speak normally, the service i get is much lower, and
often with a fake smile. But once i switch to American accent
as i have studied and worked there for 12 years, the treatment is
totally different.
1 example that i always tell my friends, there was once a local
lady ask for a seafood meal, she was 4 rolls in front of me.
The stewardess say she ran out of seafood meal and gave the lady a
beef meal instead. When it is my turn, i purposely ask her
for a seafood meal with american accent, to my surprise, she pulled
out a tray of seafood meal and give to me.
there are alot more examples as i travel alot. which is
why if for my own personal travel, SIA is never in my consideration
list.