Political Parties and Elections Bill

Was any research done into the sums that ordinary people—the volunteers, the grass-roots workers—give to a party? I recollect that it is usually between £20 and £100, and that the sums that businesses and developers give to political parties are in the £200 to £500 bracket. I suggest to the Minister that many grass-roots people will give small sums of up to £200, while the number of people giving £300, £400 or £500 is extremely limited. Why should not the public know who those people are, so that the public can hold their elected officials to account for the money that they receive?