Il-Leone,
Ferrari have always been subject to the same testing restrictions as every other team. In Schumacher's time McLaren, Red Bull, and Williams had, at various times, budgets in the same ballpark as Ferrari. It is highly likely that Ferrari still have the biggest budget in F1, yet they aren't dominating, so budget alone is not decisive.
People keep claiming, as you put it, "political favouritism" , usually regarding the FIA and NEVER provide any supporting evidence. Until such evidence is forthcoming, all such claims can be dismissed as rubbish. Following such logic would lead to the conclusion that today, with Todt being head of the FIA, it is Ferrari that should be reaping the benefits of having their former team boss in power, yet people are now claiming that Red Bull is clearly be favoured.
Since Ferrari,in all likelihood, has the biggest budget in Formula One, it stands to reason that, if their wind tunnel were as deficient as has been claimed, they would have corrected it long ago.
IMO,it is all merely grousing that the team and/or driver of their preference isn't doing the winning.