A good software engineer can be many times better than an average software engineer. Hence they are being valued by their employers as such.

I was told by a professional recruitment consultant that she has client from this industry who can request for RM8000 after only 4 years of working experience.

At the other end, an average software engineer can expect as low as 5% increment per year even when working for an MNC. Not to worry though, there are plenty of options in online job hunting websites for this industry. Its common for these employees to jump ship if they're not satisfied with their increments. They can get up to 20% increment for each switch.