Planning is seen as interference. They believe that economic development is the primary value and everything else is subsidiary to that. It's the economy stupid. The concept is that if the economy does well there will be enough money to solve our problems. The problem is that money can't solve some problems.
Private rights are more important than public values.
It's actually a very cutthroat competitive, evolutionary world view which implies that government should not mediate the way of survival of the fittest, but government should rather just be one of the competitors. Planning runs against these key cultural values. But ironically every project requires planning to succeed. Planning does happen. You therefore know the real issue comes down to timing, who controls the planning and who wins and what loses as a result.