Yes, inflation exist and I understand that it does in fact indeed the gaming industry as well.
However: For me it's a difference in how it is approached.
If we got the same content in a DLC as before and the price would have gone higher, that would be an open price raise. Open price raises let the customers see at one glance exactly what is going on and the company can easily argument with inlation etc.
What Frontier did here is a hidden price raise. Basically like when you buy your same brand of favourite crisps for years, it has the same price, but low and behold suddenly 20% less product in it. Without communicating it openly, unless you take an extra look on the weight of the package. So it's basically a way for a company to hope to get away with a price raise without anyone noticing much.
I can absolutely understand open price raises, because indeed everything is more expansive and at the end of the day I want Frontier to regrow, invest in new Devs and pay them fairly. Hidden price raises, however, do not sit well with me. Absolutely not. I feel like I am trying to be fooled and with the already damaged trust that the rocky launch of PC2 and the "changes" in the game caused, this makes me far more angry than it would have anyway.
Basically I paid a premium price for a game in beta stage and now they are basically asking me to pay additionally for a DLC that was strapped of a lot of content in comparision to previous games and in both cases they did not communicate it that clearly.