Oxfam Intermón (Spain) and Italy created those two great hidden camera videos!
They are obviously in Italian and Spanish but summarize quite well in the question “Would you pay 20€ for a coffee or a beer?”
Oxfam Italia:
https://www.youtube.com/channel/UC6_mkCB1qinEqBy34yFblgg?feature=emb_ch_name_ex
Oxfam Intermón:
https://www.youtube.com/channel/UCP978TjDBqCA14lSWeX1XHA?feature=emb_ch_name_ex