The Egyptian scored his 100th Premier League goal in the Reds' 3-0 victory over Leeds United on Sunday, becoming the fifth fastest player to reach the century.
Despite rivals adding to their attacking ranks this summer, Warnock believes Liverpool didn't need to because of Salah's contribution.
He told the BBC's Match of the Day 2: "With Romelu Lukaku and Cristiano Ronaldo, Chelsea and Manchester United have both made noteworthy signings this summer to get the goals to try to win them the title.
"Liverpool didn't have to do that because they have had a consistent goalscorer for the past four seasons now.
"I don't know why people are so surprised or question how Salah keeps doing it - he is world class, that's why."
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