BEIJING — In a country where the Communist Party makes all the big decisions, Chinese lawmakers hold very little political power. But they have plenty of money — $650 billion of it — and that’s growing.

According to the Hurun Report, a research organization in Shanghai that tracks the wealthy in China, the net worth of the 153 members of China’s Parliament and its advisory body that it deems “super rich” amounts to $650 billion, up by nearly a third from a year ago. That is just a touch below Switzerland’s annual economic output.

While President Xi Jinping has pledged to close the income gap and alleviate poverty, the wealth of the nation’s lawmakers has kept soaring. In 2017, it topped $500 billion, more than doubling from the year before. The surge in wealth reflects the strength of the Chinese economy, which grew 6.9 percent in 2017, and stock markets all over the world.

Delegates to Parliament, or the National People’s Congress, rubber-stamp most of the policies set out by the party’s leadership and are expected to approve Mr. Xi’s plan to scrap term limits and allow him to rule indefinitely when they meet in Beijing next week. But the gathering provides businesspeople with an opportunity to hobnob with one another. The title of delegate also gives them extra cachet in making business deals.