[UweSchmidt]

Irrelevant, since people are in window washing services despite the low pay.

Reasons for huge commissions:

1. Restricted field: you need a license, and in general these kinds of licenses are difficult enough to get to create artificial scarcity.

-> seek employment in such a field, if you think you can get in.

2. High stakes: A lot of money is moved around so it doesn't hurt so bad to give an important service provider a large chunk.

-> seek work where the money is. -> when dealing with Realtors etc., try and negotiate over the price anyway, just out of principle.

3. There is probably more to this profession than is visible from the outside. I don't know what, but usually people underestimate the complexities of professions they don't know much about.

-> ...? Maybe talk to Realtors and find out what it is like.