That will probably save us money. But why do I need representative when I can vote myself?
Because all it would take is one rigged vote or one bad idea with a great sales pitch to completely destroy the nation.
Take a look at our founding documents and our history. Then, look at countries run by dictators. You’ll find that all the ones run by dictators do things the way you describe (minus the internet).
Hugo Chavez loves national referendums.
Our system of checks and balances works to slow things down, so bad ideas are less likely to make it through. Some of that has been perverted or circumvented by our politicians, but we can change that if we have the will to do it. Your way will only end up in tyranny. On our current course, we may end up at the same place, but at least we have a chance to avoid it. Your way offers none.
Because we live in a Republic, not a democracy.