To give a bit of context, the design of this is that it essentially increases the tax threshold. Now the tax threshold is noted at $15,000. That is the basic personal amount.
However, in reality, the non-tax threshold for many taxpayers—in fact I would say most taxpayers—is higher than that. For example, there's an employment credit, which I think adds $1,200 to $1,300 onto that. If you have pension income, you get another $2,000, which is essentially a non-refundable credit. If you're over 65, you may well get an age credit. There are those thresholds.
With regard to the increase in that basic personal amount, given that many people in the $15,000 to $51,000 range are non-taxable anyway, they would go below the threshold and get the benefit—