Yup as other said. Even with a visa many countries (including Canada and Australia) will deny entry if sufficient funds aren't found. They actually show this in border force shows on nat geo. It's one of the more common reasons to return a citizen to their country of origin, including obvious illegal work plans, and trafficking of any sort.

A lot of the time it's a red flag that you may be doing something illegal to come and go so fast, as well as if something happened (be it medical emergency, a weather event, or other types of disasters) as they can't be planned for. If you had no money you'd end up a transient in their economy with no help and would strain their economy.