I don't quite agree on this view of yours.
Although the amount of $ involve with the gift does matter to determine if it is a bribery or corruption, there is this thing known as "on the way pick up kind of greed "
Someone with a higher authority eg a boss of mine always like to pass by my desk and on the way pickup some goodies from me eg biscuits, tidbits etc
At that time of covid lockdown, eggs were considered scarce so she could have used her power to obtain it without paying for it. This need an investigation to find out the truth.
That was also the reason that a polis friend cum colleague of mine refused to accept a sweet or coffee offered by me.