You think adding more people to the room in an already-dissonant chamber will make thing more coherent? We moved to a modified republic precisely because a huge-scale town meeting isn't practical.
For reference, the current wage is $174,000/yr (a stupidly-high amount). $174,000 * 30,000 = $5,220,000,000. I'm severely disinclined to pay over five billion dollars per year (plus additional logistics costs) for pencil-pushers to sit around deliberating what bureaucratic idiocy they will next hand down from on high.
If you include the staff there already are 30,000 reps, just that most of them are not elected. The current system is more like having 450 mini corporations running the place.