Correct Option
The correct option is 2 and 3 only.
Explanation
A proportional tax is a system where the tax rate remains fixed as the taxable amount increases or decreases. It is distinct from progressive taxation (where rates increase with income) and regressive taxation (where the burden decreases as income rises).
Statement-wise Analysis:
- Statement 1 is Incorrect.
Under a proportional tax system, the rate of tax is fixed (e.g., a flat 10%), but the actual amount collected varies with income. If income increases, the tax paid increases proportionally. A tax where the government collects a fixed amount regardless of income is known as a lump-sum tax.
- Statement 2 is Correct.
The consumption function describes the relationship between consumption and income. In the presence of a proportional income tax ($t$), disposable income becomes $Y(1-t)$. Consequently, the slope of the consumption function changes from the Marginal Propensity to Consume ($c$) to $c(1-t)$. Since the tax rate ($t$) is positive, the new slope is smaller than the original slope, meaning the consumption line becomes flatter.
- Statement 3 is Correct.
Proportional taxes act as automatic stabilisers. During an economic boom, incomes rise, and tax collections automatically increase, reducing disposable income and dampening aggregate demand. Conversely, during a recession, incomes fall, tax liabilities decrease automatically, leaving households with relatively more disposable income to support consumption. This counter-cyclical nature helps stabilise the economy without legislative intervention.
Key Takeaway:
Proportional taxes impose a fixed percentage rate on income, not a fixed amount. They lower the multiplier effect by reducing the slope of the consumption function and serve as automatic fiscal stabilisers.