because there's no life in MNC

What i notice was small company usually u dont need to work OT everyday. U will able to control & manage your own time.

Ofcoz some got exception eg, which dept u working in, company biz nature etc.

MNC cause of too many employees. sometimes. only 1-5% increase in salary.
and sometimes in small company the increase can be more.
no doubt the benefits is lots more in the MNC.
but overall. mostly MNC have very small increment.
imagine a small company with 100 people.

with a big mnc of 1000 employees.

so if 100 people I can give 7- 10% increment

but if 1000 employee.
I can give max at 1-5% or maybe at most 7%
and that one also I will choose cream of the crops to give 7% increment.

small company you have to cover all things
if large company like mnc you only cover specific things.
so if someone want to "learn and progress more in career they will go back to small company." even have more things to cover but at the end can get more knowledge and get more $

There are many reasons. Why not ask these Managers directly since you know them? Isn't it better to find out from them?

The companies you named - there is one with high turnover. MNCs with its size - there are usually politics. And politics drive people away when they couldn't stand it or couldn't get to any camp. While Chinaman companies are so... Chinaman-style, the advantage as stated by avrilmae, is that there's less red tape and easier for you to get your work done or decisions made (supposedly).

Besides, a lot of people have started to prioritize work-life balance. MNCs especially FMCG can have very demanding working hours.

sometimes it happens due to re-org and lose their position and they cant get into other MNCs, so no choice they have to catch what they are being offered, as they have families to feed. Of course in front of you, they cant say this, but have to-rephrase as working in small company is better and not too complicated. Whether they get better salary in smaller companies or not, that is also depending, small company also wouldnt purposely pay these people high pay as their revenue is also small.

you think given between MNC and small companies, people choose small companies ? really ? think again