Even if your system is super efficient, you still pay the flat rate.

即使您的系统超级节电，您还是需要付固定的费用。

youdao

Russia overhauled its progressive tax system in 2001, dropping the top rate from 45% in 1999 to a flat 13%.

2001年俄罗斯喊停其颇为激进的税务体系，把1999年起实行的最高税率由45%降低至13%。

youdao

The Bush Administration's proposed new savings accounts are a step--a remarkably bold one--toward a radical tax change in the U.S. This revolution is moving toward what I and others have long advocated: a flat tax--an income tax system with a single rate that would apply after a high threshold and that would exempt levies on capital gains, dividends and interest.

FORBES: Fact and Comment

"Under this new system, you would get the full flat-rate pension, plus you would continue to get your public sector occupational scheme, " he added.

BBC: Flat-rate state pension 'expected to start in 2017'

The advertisers however want to scrap the "pay-per-play" system altogether and instead pay actors a flat rate for all their ad work.

BBC: Strikers attract star support