I know some friends who started fostering a 10 year old girl....I admire their generosity, and they're wonderful people.
Listening to their account of the first couple months of fostering, it was clear this girl was from a low-life white trash family who's biological parents didn't care.
The girl was also fostered prior and PLAYED THE SYSTEM on our friends....which is to play little mind games, guilt trips, and the sympathy card with their fostering parents, in order to get her way
On the other hand, I have run across people that foster 2-3 kids at a time, and do this year round specifically FOR THE GOV'T CHECK $$$. They have no scruples