The Bank of Canada raised rates by 50 basis points last month to fight inflation, lifting the policy rate to 3.75%, the highest since 4% seen in January 2008. By Steve Scherer and Ismail Shakil OTTAWA, Nov 23 (Reuters) - Canadian inflation remains high and broad based and more interest-rate increases will be needed to cool the overheating economy, Bank of Canada Governor Tiff Macklem said in testimony at the House of Commons on Wednesday. "Inflation has come down in recent months, but we have yet to see a generalized decline in price pressures," Macklem said.