As long as they are not employed by a badan usaha/company but by a private party, the situation of informal staff is not addressed by the 2003 Manpower Act, so you would find almost no legal resource concerning them. Only "peripheral" laws address them (like in the UU concerning human rights, UUD, UU Penghapusan KDRT...etc)
There is also no equivalent to the UMP for non formal workers or PRT (
Pekerja Rumah Tangga) as they are formally known. There is a long awaited RUU tentang perlindungan PRT which should have been passed for some years now but there are still discussions and disagreement about it. Anyway, those who are concerned (the PRT) don't have the
means to lobby and convince the DPR that their situation deserve a fair treatment.
In this very forum (or the old one) some Expat forum members, some of them living on a comfortable Expat package, have tried to convince us that paying staff Rp600K a month was the act of a Good Samaritan. Personally I think it's just being f***ing greedy. Living on the UMP is already hard enough, so I don't want to imagine on less than that.
Should you need more information about UMP, we have an interesting (Puji diri allelujah...
) article on our sister website:
https://www.expatindo.org/indonesian-minimum-wage/