
Several to dozens of times that much
It’s hard to give up your parents’ congratulatory money.
It’s hard to persuade

(Even if you include the bride and groom, the ratio is less than half)
And above all, realistically
If your parents consistently engage in some level of social activity,
Unless it’s a very fancy wedding.
Parents’ gift >= Typical wedding expenses
Plus, it’s not that cheap for a small wedding.