Those are weak checks and balances and are essentially ineffective for those most important problem: Stories which are never reported.
There are serious systemic faults that the NYT cannot solve. For example,
1. Corporate influence
2. Government influence
3. NYT management self-interest
4. NYT institution self-interest.
I'm not saying Wikileaks is perfect, but it certainly plugs those holes.
Finally, you needn't choose between NYT and Wikileaks, both can co-exist. But the world certainly could use more Wikileaks-like organizations than NYT-like ones.