Small Charitable Donations and Childcare Payments Bill

I was about to rise to congratulate the Minister, as this seems like a really good initiative, but why apply this for only just that tax year? Given that someone is able to donate to an organisation and do it within a tax year, why not roll this over into future tax years to extend this provision? Perhaps I am being uncharitable to her, as this is a good provision, but it could be even better.