There is no 'necessary connection' between what is legal and what is moral. [=what is legal does not always have to be moral and what is moral does not always have to be legal]
Higher prices are a 'necessary consequence' of the company's new services.
I'll 'do the necessary' [=do whatever is necessary] to get the job done.
(..) How'd you pay for them? Uh, credit card. And who pays for that? Um... my... father. Oh God, come on you guys, is this really necessary? I mean, I can stop charging anytime I want. C'mon, you can't live off your parents your whole life. I know that. That's why I was getting married. Thank you. (..)1994 TvShow: Friends Title: The One Where Monica Gets a Roommate Season: 1 Episode 1