Premier Berejiklian's cabinet meets today. Credit:James Alcock In politics, as in rugby league, they say you should not weaken a strength to strengthen a weakness. The cabinet stitched together by Berejiklian and her deputy John Barilaro seems designed to weaken strengths. Why would Stokes make a better education minister than the man he's now replaced, Adrian Piccoli? In what world will Brad Hazzard be a better health minister than Jillian Skinner? Or Pru Goward a better community services minister than Hazzard? Stokes' replacement in the planning portfolio, Anthony Roberts, may yet prove exemplary. Roberts may yet deliver on the promises Berejiklian is making in his name. But he'll face something of a learning curve. Planning ministers don't really do much "planning" these days – they don't sit there with coloured pencils and butchers' paper. It is probably closer to the mark to say that planning ministers guide development, or guide the processes through which physical changes to the city and state might occur. This can be done with intelligence and sensitivity. Or it can be done without much of either.

Illustration John Shakespeare As one example of the type of thing a planning minister might do, take the conditions of consent imposed on WestConnex. When the agency in charge of WestConnex released plans for the motorway interchange at St Peters – a spaghetti mess of concrete, really – it trumpeted the idea it would create 3.2 hectares of parkland in and around the flyovers. Under Stokes, the Department of Planning called this parkland for what it was: mostly useless. As a condition of consent, therefore, the department insisted a wide land bridge be built over one of the roads adjacent to the motorway, so that two bits of open space were connected and so that people might actually use them. NSW Planning Minister Anthony Roberts said the government must have a "transparent and accountable process" for assessing development applications. Credit:Dean Osland The land bridge will add cost and annoyance to those building WestConnex. But this is the sort of intervention (not enough, obviously, for those who would cancel the road) that is crucial if the city is to be changed in a way that people do not permanently resent. And if they want to add more housing to the city, it makes some sense to complement that housing with parkland people can access.

Though the state government does not miss a chance to declare itself "open for business", the most successful politician in terms of building new dwellings in the state has been Clover Moore. Sydney's lord mayor has overseen staggering amounts of new housing, and yet she was last year returned to office with a swing of 10 per cent. NSW Education Minister Rob Stokes said the federal government has no overarching narrative on population growth. Credit:Brook Mitchell The point here is that Moore has been able to increase housing supply, which Berejiklian says she is intent on doing, in a way that people are more or less comfortable with. And she's done that not by allowing developers free rein – but by working to shape places in ways that make people comfortable. Stokes – who has been studying for a masters through Oxford to do his job better – gave the impression of espousing similar values. He spoke about the importance of design, and of promoting denser forms of housing that did not overwhelm existing neighbourhoods. Yet he leaves the job with a huge amount to be done. The Planning Act remains a mess. Six years after promising to return planning powers to local communities, the state has only centralised decision making. There is no affordable housing policy worthy of the name. A government "affordable housing taskforce" set up in 2011 never even handed down a final report.

So why did Berejiklian shaft Stokes? Was it because his criticisms of negative gearing embarrassed her or her friends in Canberra? Was it because the property industry wanted to let the market rip more than Stokes was seeming to allow? Or was it simple political churlishness? In the end, those questions don't matter so much as the result. What matters is whether the state will have housing policies that deliver for people on a broad range of incomes, and which produce places people will be glad to live in, without consigning them to lives stuck in traffic. Loading These problems are now Anthony Roberts' to resolve. And if he can't do so, the state will have Berejiklian to blame. Jacob Saulwick is city editor.