Just give Joe 100 voting credits at the start of cycle and let him spend in on whatever votes he likes - or not.
Separation of scope also helps - a.k.a. moving issues from statewide scope and to relevant provinces/communes.
In most western democracies, not necessarily America. Representatives can be held accountable and any corruption is usually exposed with dire consequences for their party.
What's the point of "ramming through" if it gets repealed in terror at the start of next cycle? Very potent point is that laws should be tried and then most of them should be repealed. Only a minority of laws should survive to permanence.
Right now we pretend that we're capable of writing good laws from the first attempt.
You just characterized the see-saw retributionary populist democracies that trashed Latin America's economies over the 20th century. Policy instability is anathema for lower-level civic and economic self-organization.
Maybe they had bad policies, maybe whey didn't, I'm not sure they'll be massively better off under any other system. If we're not talking about Cuba and Venezuela which have exactly opposite problem of failing to turn evidently unsuccessful decisions.
Policy volatility is about as significant a driver of Latin American per-capita economic growth as income inequality. Capital inflows and debt are insignificant; only U.S. interest rate volatility is comparable to domestic factors.
"Regarding macroeconomic policies, the higher the volatility of discretionary fiscal policy, the lower the growth.
...
Despite several episodes of reform reversals, most countries made progress in market-oriented structural reforms during 1970–2004, except Venezuela. The intensity of reversals was highest in Argentina, Bolivia, Paraguay, and Venezuela. Chile, Costa Rica, El Salvador, and Uruguay made the most progress during the 35 years. Greater market-oriented reforms and fewer reform reversals were associated with higher growth."
https://www.imf.org/en/Publications/WP/Issues/2016/12/31/Vol... pages 26 and 28; also see Table 17 on page 45
Direct democracy would be handing over the machinery of government to marketing companies fed by lobbies.