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.
(..) All is not well. Would the night were come. 'fill then, sit still my soul Foul deeds will rise, though all the earth o'erwhelm them, to men's eyes My necessaries are embarked, farewell And sister, as the winds give benefit and convoy is assistant... ...do not sleep, but let me hear from you (..)2015 Hamlet