There is a big difference between premeditated adulteration of a product people already use, like milk; and sweeping studies under the rug[1] about a new product.
If nothing else, a huge amount more people needed to know about the malamine scandal. How are we shipping so much milk with so few cows? Why am I dumping this unmarked 50lb bag of powder into the milk?
[1]: After looking at http://en.wikipedia.org/wiki/Vioxx, I don't see any allegation that Merck actually withheld raw data from the FDA, or provided it with false raw data. That's the great thing about a vague analogy like "sweeping under the rug": you can imply that something happened that didn't, without actually lying.
In a 2030 version of Hackernews someone will point out that a lot of people must have known about coordinated efforts to dump fluoride into our water and everyday products, pasteurize cow's milk to produce a liquid substance that does not exist in nature and then push it as healthy and essential. That thousands of people sprayed produce with toxic chemicals. That thousands of people stood behind a counter and sold people a product that kills half a million of them every year along with 50,000 of their acquaintances (cigarettes) and that America's greatest investor pushed Coke and its evil twin Diet Coke to millions of people who later abused it as part of their path to obesity and heart attack.
The micro-organisms usually present in stagnant fresh water are much more harmful than low levels of chlorine or fluoride that are added to kill them. Diet Coke does not promote obesity. Pasteurized cow's milk is fairly nutritious and is much less likely to harm you than unpasteurized milk (although the regulations in the USA are too strict IMHO).
Indeed, it's supposed to protect teeth of people unable to afford toothpaste. Whilst it actually just causes cancer. In a similar way to how X-raying everyone who wants to get on a plane protects us from non-existent terrorists.
Do you have a source for your first statement? Not that I'm implying you are lying. Certainly it's added as a mineral fortifier, but to protect the teeth of people unable to afford toothpaste? That is news to me.
Flouride additions to water was started in the 1960s or 1970s as a public health initiative to fight tooth decay, a significant health problem. It was not added as a "fortifier" in the same way that vitamin D is commonly added to milk.
I don't have a good source* on me but aspartame likely increases appetite and feeling of hunger so I don't know about promoting but it may be contributing.
There's a difference, subtle though it may be to some, between common legal practices in food and drug production and conspiring to criminally poison consumers for profit. Many of the items you mention are likely bad for the long term health of our species--but I would compare them more readily to medical practices in the dark ages than the short sighted and improperly structured health / regulatory environment we have today.
I'm deeply concerned about the world my children will inherit, but it's difficult for educated mainstream individuals to take the issues you point out seriously if they are presented from a paranoid and conspiracy theory embracing perspective. Even taking a giant leap and supposing any of the conspiracies exist to the extent some claim, the presentation still suffers because of a lack of willingness by the populace to embrace such a dark view of a society that they participate in.
If nothing else, a huge amount more people needed to know about the malamine scandal. How are we shipping so much milk with so few cows? Why am I dumping this unmarked 50lb bag of powder into the milk?
[1]: After looking at http://en.wikipedia.org/wiki/Vioxx, I don't see any allegation that Merck actually withheld raw data from the FDA, or provided it with false raw data. That's the great thing about a vague analogy like "sweeping under the rug": you can imply that something happened that didn't, without actually lying.