Interesting you raise the aspect of other salaries on the show; Koch is very successful in his own right, he should be moved on.
What Sunrise fails to do is find it's market. If it's the under 40's family types, then get two people that relate to this market.
Sam is not a mother, so seems awkward in this space - although, Sam, call me, i'm prepared to assist in any way I can
Koch is too old for the market, and let's face it, is a bit of a dick.
Today show has the market because they are the market (although Lisa Wilkinson needs "new opportunities" as she has outgrown the market).
The 50+ ladies and gents are ideal for current affairs, news and special report interviews, where their experience is valuable.
35-50 is ideal for discussion, panels and light entertainment
25-35 for reporters and youth programming