Deputy President William Ruto has decried the sudden hiking of maize and wheat flour from Ksh120 to Ksh200 in the past week.
Ruto said the new prices are out of reach for many struggling Kenyans.
Speaking in Kajiado on Wednesday, Ruto said the government failed to subsidize farm inputs leading to the current cost of unga.
"A packet of Unga is now retailing at a historic price of more than Sh200. It is sad.
"Millions of Kenyans are burdened by the high cost of living because of failure to put in place interventions such as farm inputs subsidies that could allow farmers to produce enough to eat and surplus for sale," he said.
Ruto said should Kenya Kwanza Alliance ascend to power in August, it will reduce the cost of basic commodities.
"Those crying about the crisis are responsible for this crisis due to their misplaced priorities. Kenya Kwanza — through its Bottom-Up Economic Plan — will address this problem," he said.
Kenyans online reacted to his sentiments.
Polycarp Hinga on Facebook said: "To any strangers and foreigners reading this post ... this is our Deputy President, our second in command, currently in office and drawing a salary from taxpayers. He's been the second most powerful man in Kenya for the last nine years and he has been in all governments since 1992."
Another Facebook user Paul Otieno: "Why don't you skip a one-day campaign that costs you millions and relocate the millions to buying unga and supply to wananchi who you are cheating? Your hypocrisy makes me hate you."
Others supported his comments.
Sospeter Mwangi said: "That's why you have my vote, at least you know that Kenyans who earn less than a dollar are suffering, wengine hawajui 200 ni nini."
While Evans Kafhekhe said: "Dr. William Ruto is the only presidential candidate who has displayed gesture to change country's economy by coming up with economic forums that give Kenyans chances to raise issues concerning their regions, something that hasn't been done even in world-class countries including the United States of America! God bless Ruto."
Ruto was in Kajiado County to popularise his presidential bid 47 days before the general election.
He was accompanied by Musalia Mudavadi, Alfred Mutua, Katoo Ole Metito, Peris Tobiko, Kimani Ichungwah, and a host of MCAs and political aspirants.