If you were elected before, the incumbency will advantage some.
If I'm a new candidate and I want to represent the “brown bread people” or some obscure party, or dare I say even a party such as the Green Party, which has not seen a member in Parliament and may well not get that 10%, then I don't see how this would advantage me or advance democracy in any way, because I am not going to be able to get that bank loan. I'm not going to be a good risk from the bank's perspective, because I probably won't get 10% of the vote.