这一过程的主要潜在障碍是政治：极低利率是一种很容易实施的经济刺激 — — 远比（比如）劳动力、税收和监管改革容易 — — 因此政客会对央行施压延迟升息。
The main potential hitch in this process is political: because ultra-low interest rates amount to an easy form of economic stimulus – much easier than, say, labor, tax, or regulatory reforms – politicians might put pressure on central banks to delay rate hikes.