I never understand why a windowcleaner would offer employment on those terms. Not what you asked, but in my opinion they are exploitative.
my sister had one at Thomas Cook. She loved it.
For some it works, for some it doesn't.
Being offered work is never exploitative.
It's down to the individual to take it or leave it.
If it is the only job on offer it would be more difficult to turn it down. And do you use the same defence with bad landlords? It's down to the individual to take it or leave it? Employers are simply taking advantage of poor employment opportunities.
Your sister loved the fact that from one week to the next she didn't know if she would be working?
There's never only one option IME.
Bad landlords? Yeah. If you don't like it-move out.
Bad customers-dump.
Bad window cleaners-chuck 'em.
There are loads if jobs out there.
Not Swedish volley ball masseurs but work nonetheless. All depends how much you want to work.
You've looked at it 'glass half empty' with my sister.
She had the contract, they rang her up if they needed her.
If she wanted some extra $ she went in, if she didn't-she didn't.
Everyone was happy.
Problem is-it's not a blanket, one size fits all.
I see what you mean, that some people could be taken advantage of.
But it's not the case that
everyone on a 0 contract doesn't like it.
OP asked for one, he may stick one in the job centre, someone may just like the sound of it. And go for it.