I just thought I'd throw this out there since it might be helpful.
One of the best courses I took in engineering was called Industrial Economics. In it they discussed the present and future value of money. You learned stuff like how interest works, financing on a purchase, and earning interest on your money.
When we discuss how much a tag is gonna cost 20 years in the future, the simple thing is to just add up how much it costs to apply each year, and the cost of the tag, which is not always an accurate way to look at the real cost in today's dollars. Say it costs me $100 a year to buy a point for 20 years ($2000 total), and then $2000 for the tag. Is the cost in today's money really $4000?
Say I invest $4000 today at 2.5%, I will earn $100 in interest a year. I can use that $100 to buy my point and I still have.....$4000. I can do that again the next year and still have....$4000. When I finally draw I spend $2000 on a tag and I am out of pocket $2000 from today's $4000 investment.
Of course this is a pretty simple example, and does not account for higher interest rates, taxes, the inflation of tag fees, etc. But it does show that the guy who wants to hunt Shiras moose, it is still considerably cheaper than buying a guaranteed Shiras hunt for $10,000+ today. The assumption is that someone actually saves money and invests.
There is the issue of point creep and it is VERY real. Someday several western states are gonna have to address their draw systems, when the best tags are taking 25-30+ years to draw. I am convinced there is no guarantee that points we buy today will still be in effect in 20+ years.