TORONTO -- The intensity and persistence of supply chain disruptions that have helped fuel the rising cost of living have surprised the Bank of Canada, a senior bank official said Tuesday.

In a speech to Women in Capital Markets in Toronto, senior deputy governor Carolyn Rogers said a clear view of the future has been hard to come by over the last two years.

鈥淲hat started as narrowly focused problems in a few key products - like computer chips - has spread to a wide range of goods,鈥 Rogers said according to the prepared text of her remarks released in Ottawa.

鈥淭he invasion of Ukraine intensified supply chain problems and pushed up commodity prices and inflation worldwide.鈥

And now, Rogers said parts of China are under a renewed lockdown, causing further supply issues, transportation backlogs and uncertainty.

鈥淭hese are things we didn't foresee,鈥 she said.

The supply chain disruptions have been a factor driving inflation which has risen to its highest rate in three decades.

The Bank of Canada raised its key interest rate target by a half of a percentage point last month to one per cent and has warned more rate hikes are coming as it works to bring inflation back to its target of two per cent.

Conservative leadership candidate Pierre Poilievre has been critical of the Bank of Canada and its decisions.

Rogers stressed the importance of the Bank of Canada's independence in making its decisions and the work it has done to earn the trust of Canadians.

鈥淭he desire to have a public entity separate from both the banking sector and the political process, whose job is to guide the economy in the long-term best interest of its citizens, is what's behind the existence of central banks around the world,鈥 she said.

Rogers said Canadians trusted the bank to respond at the start of the pandemic when it slashed its key interest rate and began buying bonds to keep interest rates low, and they are counting on it to move now to lower inflation.

鈥淲e take that trust seriously,鈥 she said.

Rogers noted that with inflation running close to seven per cent and spreading to more and everyday items, it is squeezing family budgets and putting pressure on businesses.

鈥淗igh inflation here in Canada and around the world largely results from global pressures such as supply chain disruptions and elevated commodity prices. But with the Canadian economy starting to overheat, we can't let demand get too far ahead of supply or we risk adding further to inflation.鈥

The Bank of Canada has said it expects inflation to average almost six per cent in the first half of the year and remain well above its control range of one to three per cent for the rest of this year.

This report by The Canadian Press was first published May 3, 2022