Why is it that the more I earn, the higher percentage of federal withholdings they take?

One paycheck I earned only $77 and the govt withheld 9% of it.

Then I earned $2,000 and they withheld 26% of it.

Is everyone else experiencing this?

The less you earn, the less percentage-wise the govt withholds? The more you earn, the greater percentage they withhold?

At this rate, I fear that if I hypothetically would earn $8,000, they would withhold 100% of it. Do you see where this is going?