You're assuming a 100% taxed marginal rate after some income level. That seems extremely unlikely. As long as the marginal tax rate is <100%, there will be incentive to work.
But who says income tax is the only type of tax? You can use a progressive consumption tax (no tax under $x item, y% tax from $x to $z, etc) to raise the funds. Economists much prefer this type of tax because it disincentives consumption rather than production.
But who says income tax is the only type of tax? You can use a progressive consumption tax (no tax under $x item, y% tax from $x to $z, etc) to raise the funds. Economists much prefer this type of tax because it disincentives consumption rather than production.