That means the politicians currently in power only need 20% to stay in power, instead of 50%.
It should be mandatory voting like in Australia instead. You don't cast a ballot, you get fined, and voting day is a mandatory national holiday. If you really don't want to cast a ballot, you cast a blank or invalid one.
True. I'd support national holiday for it in US. Also the fine I would support, but it might require a constitutional amendment (seems unlikely these days).