I can change one word of your sentence, altering its meaning without changing its truthfulness:
"I think an observation of history shows that business gravitates toward the corrupt."
We can repeat the experiment with "finance" or "the church", or what have you. There will be plenty of supporting anecdote, and quite a bit of usable data that could support such statements.
So? There is likely a deeper, foundational feature - or flaw - which invites organisations of people to corruption of intent and personal reward, over commitment to mission.
Yet we need to organise toward common and mutual purpose. The establishment of an American Government prior to 1789 was intended to focus on the beneficial aspects of that mutual purpose, and hold in abeyance the opportunities for exploitation.
It worked, more or less, for a little while.