Is it, though?

It is. A king could have 5,000 serfs and hey that's a lot of serfs. But it's nothing compared to tens of billions of dollars in an economy where most people make 35K a year. And serfs were not hot-swappable cogs like workers effectively are today. Losing a serf was a non-fungible, tangible loss.

It's apples to oranges comparing medieval feudalism to modern global capitalism, I think it's folly trying to say one is "better", but the scale of the latter certainly dwarfs the former into barely perceiveable insignificance.