Apparently inflation is measured with a consumer price index, which represents some predefined basket of consumer goods. One could define a coupon, that may be

Apparently inflation is measured with a consumer price index, which represents some predefined basket of consumer goods. One could define a coupon, that may be exchanged for said basket and it would be an inflation stable currency, right? The obvious problem is that most of the goods are perishable. Most coupons that I can think of are only valid for fixed period of time. Also each nation has a different basket and inflation. The entity issuing such coupons doesn't really gain from them. Contents of the basket change over time... But hey, maybe a CPI basket coin will be created and will be exchangable to a standard measure of inflation. Who knows.