I don't know many countries which have a simple constitution which basically only outlines the basics like the US has (which HAS been amended several times too, btw.). Even countries which have be "democratized" by the US (Germany and more recently maybe and arguably Iraq) have much more complex constitutions which include so many details that obviously, now and then they have to be amended or accommodated to the changes of times. Some countries' constitutions come as a BOOK!
On the other hand the US has a legal "system" which is not rigid and bases it self on case law, and thus finds itself in constant change. Something that often seems less the case in countries with a more complex constitution which may be amended every once in a while.
I am no legal expert at all, but I have read the DR constitution (the one they want to modify now) and found details, which in my opinion have no place in a constitution and inconsistencies which bare resemblance to the way they plan social housing around here

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At the end of all days, can you expect a solid constitution in a country where organization is not a popular discipline... and/or can you expect a country which changes constitution every two years (average) to have a chance to find an organized way to it's peace and progress?
But yes, once the changing bonanza starts, every ruling party will want to assume it's turn to accommodate things for them.
Anyways, we live in a country where laws change almost over night by presidential "decree" with virtually no apparent discussion or information. At the end, democracy seems reduced to electing the next "term"-dictator... but that's not just here.
... J-D.