If a supermajority of people agree on both the purpose and implementation of anything, then their elected representatives will easily come to an agreement as well. That's literally how laws get passed.

Conversely, not passing laws is a feature, not a bug.

> Alternatively, we pass giant tomes of legislation (esp budgets) which literally nobody can understand let alone agree on.

I agree. These massive laws are rushed through precisely because leadership knows that people won't have enough time for debate, let alone in proper order.