I prefer not to do that as my expenses do not correlate to MAS basket of items. Also, I have different items from kids' education, retirement spending, medical, etc., which are very personal, so I prefer to use different rates for each. Also, these items are ALL not perpetual. For e.g. kids' education, so I split them up.I avoid brain damage by lumping it all in a basket and then projecting core inflation out using an annual moving average since MAS core inflation is technically a basket of items less accommodation & cars. This is like, the best guesstimate I can use
I feel it's better for me this way than lump them.
