Naturally, this is also required for the master's sexual convenience.
The actual criteria to get a permit doesn't seem too onerous [1].
There is a concessionary rate for the work permit levy if the household has young children, elderly, or disabled people though [2].
[1] https://www.mom.gov.sg/passes-and-permits/work-permit-for-fo...
[2] https://www.mom.gov.sg/passes-and-permits/work-permit-for-fo...