"Democracy depends on politicians being able to keep their promises to the people"
Sorry, but if building it needs a parliament approval, he has to be able to obtain it.
True democracies have this sharing of powers exactly to avoid nuts like Trump could do much arm unrestricted, just promising the Moon without being able nor to reach nor to pay for it.
Anyway we're seen the great dealers adoption of the standard real estate dealing process - the three Bs - Bribing, Bullying, Blackmailing. May not work, this time.