I am surprised that I don't see anyone peddling this idea: in markets which are corrupt or there is expectation of weak enforcement of contracts between differ

I am surprised that I don't see anyone peddling this idea: in markets which are corrupt or there is expectation of weak enforcement of contracts between different companies - the only viable option often is to acquire what you need under your own umbrella. This is an explanation I read somewhere for why conglomerates may have an advantage.