The party system is an emergent artifact created by the enveloping government system, to dissipate energy that might otherwise be used to disrupt the functioning of that larger system and actually bring about needed systemic changes.
It can be likened to one of those push it around merry-go-rounds on a playground. You can expend all kinds of energy making that thing spin round and around, but no matter how much energy you put into spinning it, the playground never improves.