how is this government working out the whole lifecycle
These are conservatives, if they considered whole lifecycles they wouldn't be so ideologically wed to privatisation and they'd understand Keynesian economics enough to realise that Austerity is economic suicide.
A massive battery VS those parts, but yes you are right: Wear and tear hits everything. Oil filter/oil is once a year, at least.
So, how is this government working out the whole lifecycle? It's just a question, you are right about those parts too.