I'm having a bit different experience, I'm here answering this as a 95s

1) As we are all experiencing throughout our career, started off from 2-3k freshie to 5 figure salary, what makes you push to this far?
I've never worked for a company as a employee, I did work with company as a freelance. We're living in a realistic capitalism world, so I'm just gonna be honest, I wanted to have luxurious life, as well as granting my dad an earlier retirement.

2) Does money makes you happier? more fulfilling in your daily life? what do you aim to achieve?
It gave me a better quality lifestyle, I was able to travel more, to see more, so yeah I could say it make me happier.

3) What is the difference of your life earning RM8k that time and now maybe RM15K? what changes before and after?
Overall living quality improvement, but nothing much changes to be honest, at least RM15k isn't a stop-changing point for me.

4) What do you get from earning RM8k [before] than RM15k [now]? eg: new BMW or Mercedes. What is your point or goal in your life?
Do you ever dream you have this or that? Luxurious lifestyle, 3 Star Michelin restaurant, luxurious car, but you got hit with the reality you can't afford it?
Well go get it if you really WANT. That's my philosophy.