A Reverend has this to say about a landlord who is complaining about tenants taking advantage:
"He can afford for them to take advantage of him."
Is this the message of Christianity? If so, I'll stick with atheism.
People who "take advantage" of other people's generosity (in this landlord's case, child minding and rubbish removal) should be dumped or dumped on. It has nothing to do with power balance or material inequity.
A poor person can afford to be as fair as a rich person. Transactions between people, no matter what is involved, that aren't mutually satisfactory, will be very short-lived. Many people of means are generous. They enjoy being able to help. Often they want nothing in return. Their reward is the act of relieving a problem for someone else.
BUT it doesn't follow that when their generosity is abused they should turn the other cheek.
This reverend's attitude is at the heart of socialism and is essentially what makes socialism untenable. Values are not shared. Different rules apply to different people by dint of their economic status.
There is no excuse for abusing goodwill ever. Rich, poor or otherwise.