I look at it this way.... prices rise in EVERYTHING be that fuel, food, houses, cars, bikes, guns, cartridges (you name it) there will i suspect NOTHING cheaper than it was say 10yrs ago.
You just have to accept it and deal with it - we (people in general) shop around for nearly everything (and if you do not your crazy and should do), utility prices, insurances, car prices when buying a new one, mortgage rates - so simply apply the same method to your hobby (in this case shooting) and shop around, be that cartridges and grounds. There is absolutely no need to be paying £200+ for cartridges if its an issue or you do not want to - i spent the last 2 years shooting a shell that cost £155 retail and have broken most targets with them. Trust me i did not miss because the cartridges were cheap / no good - i missed because i put the gun in the wrong place.
Of course wages rise too will compensate / offset some of the increases. Yes i realise i am lucky in that i work in a factory and they pay me a % shift premium, overtime is regular available and i get an annual pay rise......but.....
If the costs outweigh the enjoyment / value or affordability you just cut your cloth to suit. I made the decision a while ago to cut out "donating" to the prize fund saving me typically £5 per hundred - that means every 5 - 7 shoots in effect i get a "free" B/O entry.
I did not travel abroad to shoot in 2016 and it's looking unlikely in 2017 aswell - in fact i am likely to cut out some major UK shoots in 2017 as it gives me more weekends shooting standard registered targets for the same money.
A CPSA championship typically costs £45-£50 per hundred where a standard B/O registered will cost me say £30 - so 2 championships OR 300 registered targets?
A NSSA championship typically costs £40 per hundred (400 a weekend = £160) where a standard B/O registered will cost me say £30 so 1 championship weekend or 500 registered targets over 5 weekends?
If the grounds / associations and manufacturer's need to increase prices then so be it - if that means i shoot less / stop shooting so be it. That is their gamble and trade off to take not mine as life will go on.
It is for 95% just a hobby - frequency and participation vary while we do other things in life which are more important or enjoyable at the time.