Policies that are really short statements that provide a real pop in support are incentivized under winner-take-all systems, whereas longer-term policies that might be harder to implement are disincentivized under our current system. Alleviating poverty would be one potential example, and I think the proof is in the pudding. Look at Professor Lijphart's study of the real results of all those 38 democracies over the last 40 years under consensus style or proportional systems compared to winner-take-all systems.
On October 4th, 2016. See this statement in context.