Do you think that major pharmaceutical companies hide medicinal cures for existing diseases or at least hide significant progress in working toward such cures?

I probably sound cynical but pharmaceutical companies are multi-billion dollar corporations and they make a killing off of the consumers buying their products. It certainly appears most advantageous and lucrative for them to hide cures and medicines for such cures so that they can keep skewering the public with very high (sometimes ridiculously high) costs for medication.

Could they even get away with this, do you think? Wouldn’t someone with a conscience finally step forward at some point and want to do the right thing?