Yes, but by adding more tax brackets. Have higher rates on the higher incomes while maintaining the same tax rates for lower incomes.

That's an interesting point. However, historical evidence shows that higher tax rates don't necessarily translate to more tax revenue. For instance, during the 1950s and 60s, the US had tax rates above 90% for the highest earners, but tax revenues as a percentage of GDP weren't significantly different from today’s tax revenues. This is largely due to tax avoidance strategies that high-income individuals and corporations may employ when tax rates rise.

Additionally, there's an economic theory known as the Laffer Curve, which suggests there's an optimal tax rate…  Read more that maximizes revenue. If taxes are too high, they could stifle economic activity and actually lead to lower revenues.

Could a better solution be to simplify the tax code and close loopholes, to ensure everyone pays their fair share, rather than adding more tax brackets?