Maimonides opined that there are eight levels of tzedakah: From the lowest level of giving charity unwillingly or begrudgingly to the highest level of offering a loan, partnership or job to help another to eventually support themselves and their family independently. Furthermore, there are Jewish traditions that the degree of charity is relative to a receipiant's status in life. As such, a person who lost their wealth should be supported to the degree that would allow them to sustain their current life-style. In addition, there are times that the concept of tzedakah is merged with that of mitzvot. (Tzedakah is a mitzvah, but not all mitzvot are tzeddakah).
What are acceptable uses of charity? I understand the concept of once giving charity, just as a gift---unless conditional---is no longer the property of the giver, but I am not completely convinced that applies here. Of course the Maimonides Levels of Tzedakah provides some direct or implied answers to my question, but I am seeking a more thorough explaination.
Some examples of use of tzedakah:
Volunteering in a homeless shelter.
Volunteering your master-chef skills in a homeless shelter
A yeshiva using donations to throw the "Best Channukah Party Ever"
A shul using donations to fix the roof. To replace 500 near mint condition Art Scroll siddurim in with the Koren.
A homeless person using charity to buy food. To buy a cell phone. A ticket to a movie? An organization uses donations to secure counsil for their Rosh Yeshiva who was recently charged with money laundering and real estate fraud Giving a car ride to someone who doesn't have the money for fare.