Yes, I agree with jay.validus, while a psychiatric diagnosis might lead to a monthly SSI check for a mystic, the diagnosis is surely going to lead to being labeled paranoid and/or schizophrenic, which leads to being marginalized. Also, it is all too easy to get institutionalized and heavily medicated that way.
Another draw-back on the psychiatric diagnosis is typically one will be required to have a "payee" who disburses the money for you. This means a small amount of money to buy food with, and rent will be paid for you to live in a slum. The Social Security Administration definitely discourages people living in a motor home, because a high percentage of the people on SSI have drug and/or alcohol dependency issues, which tends to lead to lots of social problems; so they prefer to keep all of the SSI recipients in the ghetto.
Another disadvantage to SSI is one is not allowed to leave the country. The Social Security Administration does not want to be paying for yogis to retire to India on an SSI check.
I did end up on SSI myself, but only about 2 years ago after applying about 5 times for a well-documented back injury, so it is not that easy to get SSI. Since I just turned 62, the Social Security Administration switched me to early retirement.
The back story on how easy verses how hard it is to get an SSI check is political. Under a Republican president and/or congress & senate SSI is very difficult to acquire, because they depend upon votes and funding from the wealthy and middle class who resent the poor and disabled getting a check.
Whereas, under a Democratic controlled government, which depends upon its votes coming from the poor, SSI is far easier to get. Also, it is common practice for a president to fudge the unemployment figures by shifting the unemployed over to SSI, and thus making it look like unemployment has declined in their administration.