It would be better to hold referendums instead. An important decision should be brought directly to the populace rather than be driven by the whims of the currently elected party in power (regardless of political stripes). Examples of important questions are: Should we allow X people to immigrate per year? Should we go to war with country Y?Should the new tax rate be Z?

The Swiss do this. They are one of the populations most satisfied with their government. Referendums work.