T-Mobil is an infrastructure company. Time Warner is a content company. You can't compare the regulators blocking an infrastructure company (AT&T) from purchasing another infrastructure company (T-Mobile) to a infrastructure company (AT&T) acquiring a content company (Time Warner).
I'm not saying they are comparable; I'm pointing out that regulators are willing to block mergers and purchases, unlike the implied claim that they'll rubber stamp anything as long as they've been paid off.
As if the people who see bribes everywhere won't just claim them that the right people just weren't bribed, or that the competition's bribes were more convincing. Once bribery is assumed without evidence, it explains everything.