Bertie still won that year though (and nevertheless how little assistance he got from Lance, he did still have him around in the mountains to discourage other teams)
pharmstrong never rode to help anyone else - the fact that the team was split into two camps, with only a couple of riders helping Bertie, was only nullified by there being no real competitor... and, as i have said about bertie (and froome), he can fight alone.
having Wiggins in the team would be an issue and i doubt the combined egos would be able to cope. better to have riders who are willing to ride for their leader... it what they are paid for, shame Wiggins (and Froome in 2012) don't get that.
Sky want to win the race with their leader - as do the other GC contenders - nationality doesn't come into it. other teams have left out British riders, they have also left out French riders (lest we forget, all but 3 of the stages will be contested away from this island). i doubt any of them has a plan B if their leader gets injured - there is no room for two leaders in a team.