you get close to 50% voting one way, and 50% the other because 85-90% of western populations always vote the same way. you could put literal satan on the democrat ticket for example, air news of him drinking babies blood and it wouldn't make any different. for this reason, only 10-15% of the population have any real power, and those are the people elections target and policies reward. the majority of swing voters fall into two categories: single mothers, struggling families, and unemployed. there's some overlap in those categories.
Australia