It 'ought not' ('to') make any difference. [=(more commonly) it shouldn't make any difference]
Children 'ought not' [='should not'] run near the pool.
If my math is correct, the result 'ought to' be zero.
(..) LUIS: Me and Benny have Iunch together. NICK: He probabIy knows me. We're up to what? Seven cheques. $. $ more. -We ought to take a Ieak. -Freeze! Get your hands up! Go against the waII, turn around. You're not kidding. You're under arrest (..)1983 Scarface
(..) That's styIe, fIash, pizzazz. And a IittIe coke money doesn't hurt nobody. Look at this. F$cking onions. They ought to be picking goId from the street. There's two guys Iooking for you out there. That's him, man. That's . I toId you. (..)1983 Scarface