Power Argues With Power

And it should. We don't want powers getting along with each other.  The Founding Fathers creted a systm that required a majority rather than a coalition government for wise reasons. In Our Republic, Power Argues With Power, 

By contrast, consensus systems run on deals. Every group gets its piece: a subsidy, a spending, a regulation. Add them together, and you’ve got a system crippled by bureacracy and spending, and nobody can punish the total of it because nobody designed for the total of it.

That’s the EU in a nutshell. (It’s also what the modern Senate filibuster does. By removing the traditional filibuster mechanism of holding the floor and actually arguing, almost everything has to be bargained. And so we get those awful omnibus bills.)