Quora asked if a cap on political donation lead to better politics. This was my quick answer.

Yes, this helps, and in surprising ways sometimes. At the national level in Canada, new spending limits has resulted in the main political parties now doing as the bulk of their supporters want them to do. The introduction of spending limits has resulted in all major political parties promising fairer elections, with fewer wasted votes. Provincially, some provinces do have a cap on political donations but some don't. British Columbia allows large corporate donations and as a result, trophy hunting is allowed in BC, despite the fact that the majority of people oppose it. Hunting organizations had given tens of thousands of dollars to help the main political parties at election time, there.

  Simon Luisi