i am an employer, so i will answer this from an employer point of view. reason for this would be:
1. to check and ensure you really work for x company like what u write in your cv
2. to check and ensure you really earn $ like what u write in your cv
3. to check and ensure your name & address is real

i have personally encountered and know people who have seen cases of fake cv, fake address, fake names

positions that require normally involves people who deal with $ that includes:
- people who sells things
- people who deliver items (last mile)
- people who collects money for the company

there's cases of staff disappearing with rm 50k (daily take of shop), or sales staff who sell , collect cash , never deliver goods, and so on.