No you're right that he didn't spend money on either Voronin or N'Gog, but we obviously have spent it in other areas. Now if this is going to simply go down the "but we haven't spent as much money as Man Utd and therefore we can't compete" route, then we might as well retreat to our respective trenches and call it quits. The facts don't bare out that particular line of argument on two levels. Firstly we have spent as much money as Man Utd over Rafa's tenure, more infact. Secondly, we did compete very well last season, so the theory is disproven on two counts.
We may yet compete this season of course, i think if we can keep everyone fi there is every chance that we will get somewhere near at least. Ultimately though, as you even admit yourself, going into a new season without any striker cover is a terrible error of judgement. It's not even like it wasn't an obvious deficiency. I'm not talking about David Villa either, I'm asking for someone who is better than N'Gog and Voronin. The list is quite a bit longer than one name.