The fundamental flaw in any reasoning that leads one to believe that a bigger stronger central government should be empowered to protect the poor, ignorant, powerless individual from the big evil corporation is the assumption that big evil corporation will be unwilling or unable to unduly influence that same (presumably) benevolent government.
To use the coke vs. pepsi analogy: Once the government has been empowered to choose which will be the national drink, coke and pepsi will abandon any effort to please the consumer or convince the consumer of its superiority and instead spend all its effort and capital trying to influence the legislature that gets to make that decision for the masses.
Congratulations! Rather than having two companies vying for your dollar, and likely doing everything in their power to convince you to buy their stuff–both in good ways, such as making a better, cheaper product, and in bad ways, trying trick you to make you think you’ll improve your life by buying their product–now some drink czar gets to tell you what to drink, using your tax dollars and the power of the law to compel you.
“If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen…and buy my beer”–Samuel Adams