Only if the Senate was the only branch of the government. It's not even the only house in it's own branch. Senate cant do anything without the house. Various other checks and balances exist to make sure the 30/70 isnt the only consideration.
It's not a fractal argument. One small piece is not representative of the entire system.
And how is a system where the people can vote themselves more privileges not asking to be rife with corruption too? Especially when the two parties run their whole campaign based on promises of the new or better privileges. The corruption has nothing to do with how they are elected. The corruption stems from them having too much power. President, senate, representatives, governors, mayors, politicians in general.
You give a rat two buttons, one stimulates the pleasure center of its brain the other gives it food. The rat will kill itself pressing the pleasure button ignoring the food it needs. Our population isnt any better. Just look at us. We are a divided bunch of fat arses addicted to our phones. And yes I say that as I sit on my fat arse arguing with someone over my phone.
Do you really think average American Joe Blow knows what's good for him, yet alone the nation? Are you really saying the best option is to give over power to the walmart crowd?