I think people like Ponting, Gilchrist, McGrath etc. deserve a rest. If the replacement players are good enough, which in a few cases they were.
However, when rubbish like Dorey, Johnson, Lewis, White, Hopes, Watson, Hauritz, Campbell, Williams, Haddin, Young, Maher, Harvey, Di Venuto, Bichel, Hogg, Lee (S), Law, Julian, the like, are picked, they generally do poorly and deserve to.
Still - the fact remains that in Hussey, Clarke, Bracken, Symonds (eventually, after a long time when he was rubbish too), Gilchrist, Lehmann, Dale, Gillespie, Ponting, Bevan, Fleming, McGrath, Warne, Martyn (eventually), Reiffel, Mark Waugh and Moody, Australia have over a long period of time had quite a few outstanding ODI cricketers, and in Stephen Waugh, Taylor, Hayden, Kasprowicz (eventually), Lee (B), Clark and Hodge some pretty decent ones. It says a lot that Matthew Elliott, with a List-A-OD average in the 40s, has played just 1 ODI, though it's often struck me as inexplicable.
Quite simply - if the players are good enough, they're good enough - if they're not, the team will pay for playing them.