Many are honest and competent. Unfortunately, however, not all.
Some exploit their position of trust to run up fees for themselves and their friends - at the expense of the person to be cared for and their heirs.
The multi-trillion dollar estate industry has attracted more than a few of these vultures.
BEWARE!
See also:
Prosecution Toolkit for Elder Abuse and Financial Exploitation
Ressources Elder Abuse - Fraud and Financial Abuse