Oh god yes they have secret agendas.I think the whole reason the government scrapped it's Nuclear Program in the 80's/90's was because there was a sudden abundance of North Sea Oil and Gas found a decade before.

And now that the oil has peaked a decade ago along with gas...oh, would you look at that? We suddenly have new Nuclear programs being implemented, expected to be operational about a decade or so before we expect the UK oilfields to run out in 2030's.

Others probably have less nefarious profit-oriented agendas. Some politicians may get into that career because they want a new swimming pool or something for their community (but mostly for them to use it) and then mask it under a range of other policies to gain popularity and get voted in.

Most do, and the ones who don't are incompetent.