I adopted. Never saw a penny. We were told he was a child with no issues. Ha ha f*ing ha!
Anxiety, self harm, self medication with legal and illegal substances, couldn't cope in mainstream school so was home schooled, now 21, not working, rarely leaves the house, recently diagnosed with Autism (despite being told for years he was just naughty) and on waiting list for ADHD assessment.
We applied for financial assistance for the therapy he had regularly for about 10 years, but we're denied every time. £150 - £200 a month for 6 months at a time, most years. Probably cost us 10k+
Even now at 21 he needs a lot of support and input from us. He functions as a 15/16 year old. I couldn't - and still can't - work full time, and have had to take lower paid jobs for the part time/flexibility aspect.
People shouldn't be swayed into adoption because it's a source of income, that's not fair on the children concerned, but there should be some financial recompense.
Now, we encourage him to claim every benefit possible, just to take the financial burden off of us.