I see your point but Chelsea was never about acquiring big stars , we have a strong enough squad to win but in the end lady luck was always on the opponents side.
Also, many of those player's you have listed were all speculation, we've probably shown interest but really never pounced on the deal, if Chelsea really wanted to buy Kaka or Torres etc, we would've offered anything we could to get them. I guess Roman has his own reasons and priorities, and that's why we've backed out on Johnson, Robinho, and Zhirkov.
Just remember the transfer market has only started so stop saying as if we have failed to buy a player when it's only June. In my opinion, the only players worth looking at are Pato, Ribery, Aguero, and Benzema. Age and depth is the only problem we have and with both Anelka/Drogba in their early 30s, we need to strengthen that line up.
It's also quite possible that Chelsea won't buy any "big stars" in this transfer market, and that's fine with me as long as we buy the right players at the right price (Bosingwa was a steal), in this economic crisis I don't think it'll do the club's future well if we shell out 100 mil for Ibrahimovic or David Villa.