Equates to about $314, or a month's pay per employee by reported estimates.
There was also a government initiative known as 'the threshold' but that was a permanent uplift in pay, again depending on transparent criteria, and again accessible to all teachers after their 'probationary year' (first year of teaching) was completed.
[1] Source for e.g. receptionists: http://www.worldsalaries.org/hotelreceptionist.shtml