@trostparadox asked "A centrally-planned economy is often credited as being inefficient, ineffective, and limiting, due to bureaucracy and conflicting ideas from planners. In contrast, what example(s) of a government and economic system operates effectively while successfully preserving the freedoms of the people? Furthermore, what hinders such system(s) from being widely accepted and implemented, and what would improve acceptance and implementation of such system(s)?"
An example of a government that successfully operates effectively and efficiently in an economical sense would be a parliamentary system. Parliamentary governments have several aspects that keep the system operating effectively while preserving the freedoms of the people. Frequent elections, diversity of opinion, and lack of a two-party system typically found in presidencies are some of the benefits to parliaments. These governments can be highly adaptable while removing room for societal polarization.
A key part of the reason parliamentary governments are effective at commanding a country is a great separation of powers with better deliberation. An open floor representing many groups of people makes other issues more well known. Another positive of using a parliamentary governing body is an easier transition of power between administrations. There are fewer governmental deadlocks with parliaments compared to presidencies.
With the positives of a parliamentary system, there are several negatives that come along with this type of governing body. The majority ruling party of a parliament has the final say for any piece of legislation passed. This often leads to fewer compromises and the minority ends up not being taken seriously. Other faults are limited voter influence and a lack of local concerns. Direct representation in a parliament is not addressed, leaving citizens to be largely disenfranchised.
Unpredictable election cycles are another common issue that leads to parliaments not being implemented. Voters can be called upon to vote at almost any given time. In the United States of America, there are many citizens that can not or will not make it to the polls. However, it is very common for the Senate and House of Representatives to be prepared to vote on legislature at any given time.
Other obstructions to implementing parliamentary systems are that there is quite a bit of overhead needed to do this. Often, governments are built this way with a monarchy or another way from a destroyed government. Changing to this system from a very well-established government would not be easy. Also, the parties that the ruling coalitions are made from can find ways to manipulate government operations. Sabotaging government programs through means of corporate operations or even rebels can go over poorly for the system and the general welfare of the people.
Although there is much more freedom for economies and many positives to using a parliamentary system, each and every government type has its issues. A parliamentary system is usually able to fend off coups with relative ease, but there are still hindrances in the system. Several of the freest economies use parliamentary democracies or parliamentary monarchies; including New Zealand, Singapore, and Finland.