with today's technology!

thats a very good but pointless question.its like asking why planes aren't made of that indestructible black box material

got to admit ive wondered the same thing , although i think they are getting better

i guess the goverment don't wanna pay more money or something like that

I suppose because many CCTV systems were implemented in the days when technology was weaker than today. Even then if the CCTV cameras were put across a whole country, it still was very expensive and took a long time. Now that we have such superior video quality, it will be even more costly to implement and update a whole system, so maybe that is why they don't have better quality.I am sure that a change would happen if many crimes are going unnoticed or are very hard to distinguish from the quality of CCTV camera footage, and therefore evidence of a crime is not enhanced by the use of CCTV. In short, when technology improves so much that the use of CCTV is no longer needed or has to be changed, then perhaps governments will update them. Also, if they do change the CCTV cameras, they would want them to last, and to be durable enough to stand the test of time. So when they do change them, CCTV cameras will have thermal and night vision modes, a greater quality of zoom and maybe Xray, not only better image quality. So the authorities are waiting for a time when CCTV cameras can be radically changed and will last a long time.