I try to avoid paying the bus fare.
I try to find a maid in the area of the apartment I need the weekly service. This way I avoid paying any bus fare or extras.
If they do have to come from further away, I just give them an increase but I don't say."the $4 is for the bus ride". They can choose how they come and go. I just don't want to get involved in their transportation. They can take a taxi if they want. Their choice, I just make sure they are paid well for their job. There is something very "Peronista" about paying their transportation.