In my life due to financial issues I have dealt with a lot of bottom feeders. I hate bottom feeders! I'm talking about people who may themselves be addicts, poor or disabled (or none of these things) but have zero empathy for others or are actively criminal. If you turn your back, they will steal from you or worse. They will never do an honest day's work. They are leeches. Because of them, people don't trust strangers even decent ones. Bottom feeders give the whole human race a bad name.
My friend's older sister is one (I talked to my friend yesterday). Now 60, her sister has leeched off her parents her whole life to the tune of hundreds of thousands of dollars, while feeding her alcohol and drug habit. She astonished everyone by finally getting a minimum-wage job when the government pressured her, but she spends her entire paycheck at the pub and on cigarettes and alcohol. She lives with her mother who enables her and pays for everything and does all the cooking and cleaning. Her mother is now 89 and has fallen a few times and broke her arm when the daughter was at the pub, and laid for hours with no help--once overnight when the daughter came home drunk. My friend lives in another city but finally got her mom a bracelet that she can call for help with, realizing that her sister is useless.
The mother insists that the daughters will be joint executors of her will. She feels sorry for the oldest daughter because the younger one (my friend) owns a house outright and has always worked so she has a lot more money. My friend thinks it's going to be an absolute nightmare after her mom dies, getting her sister out of that townhouse which (being Vancouver) is worth over a million dollars. Her sister will not keep the place clean so it may be hard to sell. She has a "boyfriend" who sells drugs and may move in.
Oh yeah - and in the past her sister faked cancer a few times to extort more money from family. What a winner.