Any time you have an uneven distribution of power, be it a government or a corporate monopoly, you need to have some safeguards in place to ensure that power is not abused.
Plus the comparison is wrong IMHO. Governmental power is a resource over which a party can have a monopoly. But currently no party has.
I admit that I fail to see the point of your post. Might be just me.
That aside.
There's a huge difference between a company and a government. Because I only get to decide on the politics of the latter. But luckily my government has jurisdiction over companies operating in the country in question, giving me also some power over them.
So. To make this clear: A government having control over people without the people having control over it: A potential problem. A company having a monopoly and therefore control over people without the people having control over it: A potential problem.
Luckily the people get to control the first, which in turn has control over the latter.
Sorry, but this is getting ridiculous.