can employer pay incentive for attendance?

some employees taking emergency leave unpaid leave (suka suka emergency, annual leave habis guna so apply unpaid leave) like no tomorrow causing operational distruption

those staff who have good attendance fed up to back up them

fire them is illegal
deduct salary also cannot

for new hiring, can company comes out salary package like

salary RM1700
if no unpaid leave or MC will pay incentive RM3300

for those existing staff, can offer them new package, if dont take up new offer forever no increment? is it legal?