I shouldn't wonder

I imagine or am confident that something is the case. Often followed by an "if..." statement, which uses a negative verb. Is this senator for real, talking about people spending money on things they don't need? He probably has four houses, I shouldn't wonder. I'm no economic expert, but I shouldn't wonder if establishing a basic income for all citizens wouldn't be a huge boost to the entire economy. I shouldn't wonder if I'm not going to get the promotion. The managers have always liked Amanda more than me.

I ˌshouldn’t ˈwonder (if ...)

(informal) I would not be surprised to find out (that ...): It’s paid for with stolen money, I shouldn’t wonder.