He said that people are turning to more own-label products and away from brands, with sales of these own-label lines growing consistently over the past nine months.
People shopping for food and essential products need confidence that they have the right information to make decisions, and are getting fair deals, according to the Competition Markets Authority CMA.
Supermarkets would find it hard to increase prices quicker than competitors because the grocery sector was incredibly competitive and most people have four or five supermarkets that they can go to, he said.
While people have been cutting back on video streaming services, that's something people can cut back on, but if you need to feed yourself, feed your family, you're going to have to go to the shops, according to McKevitt.
As people hunt for bargains and new stores, discounters Aldi and Lidl have grabbed a bigger slice of the grocery market in the UK for a number of years.
In January sales jumped by about a quarter at Aldi and Lidl and their market share increased by about 1% each as the trend continued, but higher sales were also driven by price rises.