It shouldn't have. I'd wager that if you actually sat down and assessed your real costs, you'll find that your expenses have likely doubled as well, since about 2000.
Well there was that jump when I upgraded to my McMansion in 2006.
While gas prices have been fairly flat the past couple of years, the price of a gallon of petrol near where I live was right around $2.20 in 2008 and is $3.57 today; and has been as high as $4.09 in between.
So it seems that your memory is suspect afterall. Gas may have been in the low $2s in 2008, but it was above $4 in 2007. Perhaps you should look into the reasons why it was so cheap in 2008? Because it does not make your case at all.
The offical CPI suppresses
There was no statement made about the official CPI, stop red herringing. Shadowstats is just as big of a pile of bs; pointing out the flaws of some other flawed metric does not make Shadowstats not flawed. Besides, all it is doing is obviously just adding 5% on to the CPI, there is no actual metric.
And I don't have the data points, but if we assume roughly 8% inflation since 2000 according to shadowstats, that means there has been ~150% inflation in 14 years. Someone making $50k today is the same as someone making $20k in 2000.