Yes, like Carvalho but then he has 1, maybe 2 more seasons left in him so there is no rush for a partner for Pepe or a RB and getting Maicon now would be stupid since Ramos would be pushed over and Carvalho would go the the bench, unless Mou would want Pepe at DM permanently. And the difference between signing Carvalho and Maicon is that we needed a quality player like him, he wouldn't cause squad pressure, he didn't cost shitloads etc.
And signing Maicon would need large sums of money (bout 30-40 I would say) so again, it contradicts with your previous theory of RM going bankrupt
Lampard for Kaka? I'd take that, but Chelsea aren't stupid enough, neither is Lampard.