The proposed reform has been discussed by the cabinet and is currently being considered by Qatar's Shura Council, an assembly that has the power to draft new laws.
Khulaifi also said Qatar would fully implement another major labour reform - an electronic payment system for thousands of migrant labourers - by mid-August. This would ensure that up to one million workers get paid at least once a month and, in some cases, every fortnight.
Many labourers working on major infrastructure or World Cup projects within the gas-rich Gulf state have complained that payment of their salaries is often delayed.