You may agree with what a party says but if you actually agree with what they are doing it is only because they managed to deceive you.
The interesting thing is that individual politicians in general actually do most of the things they say they will do while campaigning. Most outright "promises" are not technically broken.

But this is cleverly concealed through a mass of obscurantist and non-committal language. When politicians "say a whole lot of nothing", they're doing so in a very careful way. "Plausible deniability" is one way to put it.