In most places around the world, after the hike fuel price normally it will be followed by price increment for all other items & in the end the currency will experience higher inflation rate, which will reduce the value of the money.

Fuel price just increased few days ago:
http://www.qatarliving.com/forum/qatar-living-lounge/posts/petrol-prices...

But luckily Qatar government took a smart strategic move by stopping shop rent hike:
http://www.qatarliving.com/forum/news/posts/shop-rents-cannot-be-increas...

Otherwise (if these 2 prices, petrol & shop rent increased on the same time), it will "legalize" the business people to increase price which may lead to the inflation of Qatari Riyals.