Why is it only the stupid people in Government make it to central Government ?

Because other stupid people vote for them.

Lol maybe, but really I think its down to the fact that they are the most easily guided by such things like fuels companies etc , so they receive the most campaign money to use no the public in the sense of hard sell mentalist techniques

I don't know that being stupid and being "easily guided" are inclusive.

Is your question whether "stupid people" are more easily "bought" by people with special interests?

I mean weak minded people that cannot see beyond there own selfish needs, not understanding something greater than their own importance, a total ignorance to their function to maintain the system, the system to provide a substainable inferstructure

Then I'll go back to my original thought - weak minded people who cannot see beyond their own selfish needs, etc. are elected by other weak minded people... and so forth.