Why is Peter Dutton Worth 300 Million Dollars?

Why is no one in the media asking? Google how much is Peter Dutton worth. Now I'm not saying he is worth that but if the Prime Minister of Australia, Anthony Albanese buys a home for $4.3 million, a sum he could legitimately afford - it's front page news. So why is there one rule for Labor and another for the Liberal party and their leader? Even if its not true, why no transparency? Why are some people off limits? It's the politics of envy unless its Albo buying a house and suddenly every detail is published