Czechia is still undergoing catch-up growth, much like Germany during the Wirtschaftswunder (that made their "social market economy" widely popular) and emerging countries today. When people say "social democracy" doesn't work all that well compared to leaner approaches, they mean countries where that growth process has concluded. With an overregulated economy and a high burden of all sorts of excess red tape, they tend to get stuck in a middle-income trap that leads to widespread unhappiness.