A regressive tax is one which everyone pays the same regardless of income. Sales tax is a regressive tax. Property tax is a regressive tax.
A flat percentage income tax is progressive. The more one earns, the more they pay. If the flat tax is 15%, someone who earns a million pays $150,000, and someone who earns $30,000 pays $4,500. The richer someone is, the more they would pay.
A flat percentage income tax on all income from all sources is progressive, fair, and simple.
Using your reasoning, sales and property taxes are also progressive, because wealthy people purchase significantly more goods and properties, which are frequently more expensive than a middle class person would buy. Thus, the rich end up paying more taxes.
Using my logic, tax assessments that don’t change based on income are regressive, and tax assessments that do are progressive. It’s not complicated, and it’s a widely used definition.
A flat percentage income tax is progressive. The more one earns, the more they pay. If the flat tax is 15%, someone who earns a million pays $150,000, and someone who earns $30,000 pays $4,500. The richer someone is, the more they would pay.
A flat percentage income tax on all income from all sources is progressive, fair, and simple.