I feel like my sil should work.
Why would you expect your sister-in-law to work?
My sister in law is a pathetic parasite, she survives on welfare and she doesn't have any idea about finances.
I don't think it's a good idea to get involved in your sister-in-laws personal affairs. What she does shouldn't affect you. I think you should leave her alone.
You're right, it'll only cause drama. She is not likeable because she's a feminazi.
You should respect her. If she is living with you she should be expected to contribute to the household. Avoiding drama is the best course of action.