I don't think I buy the thesis here. There are plenty of western countries without the "vetocracy" structure of the US's republic. And yet they still haven't built much infrastructure or accomplished much in public works for the last 30-40 years.
The reason is simple -- there's no money. No public money.
There's more private wealth than there's ever been, but public sector investment is a fraction of it. The state has lost the ability to collect reasonable tax revenues from private entities, and it's lost the ability to efficiently spend it.
And in large part this is because of a protracted ideological war that one side has effectively lost and another side has effectively won.
Excessive partisanship is a symptom of this ideological divide, not the cause.
The reason is simple -- there's no money. No public money. There's more private wealth than there's ever been, but public sector investment is a fraction of it. The state has lost the ability to collect reasonable tax revenues from private entities, and it's lost the ability to efficiently spend it.
And in large part this is because of a protracted ideological war that one side has effectively lost and another side has effectively won.
Excessive partisanship is a symptom of this ideological divide, not the cause.