Inactivity is killing us (Political & Physical)

Public Health England is currently consulting on 'Everybody Active, Every Day':
https://www.gov.uk/government/consultations/everybody-active-every-day

An extract from the first document (An evidence based approach to physical activity) on the link above:

Inactivity is killing us 
Physical inactivity is responsible for 1 in 6 (17%) of deaths in the UK. This makes it as dangerous as smoking. Yet over a quarter of us are still inactive, failing to achieve a minimum of 30 minutes of activity a week, and in some minority communities this falls to only one in ten adults. Whilst measurement differences limit direct comparisons, international studies using a single methodology consistently demonstrate that we lag behind most other similar countries in reducing physical inactivity.

In Tooting as you can read from my previous post about Fishponds, and the unanimous decision to do nothing by Labour and Conservative councillors on a recognised problem. The pie chart above highlights that there is a consensus that there is a problem, just a difference of opinion on how to fix it. 

The second document (Implementation & Evidence Guide) in the consultation on 'Everybody Active, Every Day' has the following extract (pg 9):

Road transport contributes to a number of health hazards and health inequalities, causing air pollution, noise and injuries, particularly in urban areas. More disadvantaged areas tend to have a higher density of roads and traffic. Pedestrians, cyclists, and users of other modes of transport that involve physical activity need the highest priority when developing or maintaining streets and roads. This can mean re-allocation of road space to support walking and cycling; restricting motor vehicle access; introducing road-user charging and traffic-calming schemes; and creating create safe routes to schools. Such policy changes have prompted substantial shifts from car transport to walking and cycling. 

Other boroughs of the same political colours representing Wandsworth today are cracking on with making these necessary changes happen. Why is it that both parties, Labour and Conservatives, locally seem so reticent to engage with the evidence base for the benefit of all?