Well that's the safest conculsion to be drawn from a study of election promises.
National and Liarbour government apprantly keep around 80% of their policies, though in the MMP-era this fell to 62% under MMP.
And apparantly Muldoon was one of the most honest of the lot!
The survey also showed that governments who kept their policies lost support!
Now wonder Liarbour lies and hides its policies then. And with parties (Key-National excepted) needing the support of Winston Peters to form government, no wonder the MMP-era has made them less honest, leading to the dodgy goings on, and Dear Leader's impotence and infatuation with Peters that we see today.