These fictional people who would love to work for less than $7.25/hr are free to do gig work that nets them less. They are also free to panhandle on the side of freeway off-ramps, which I imagine many would prefer to the concept of being paid $5/hour to take orders from a person who lacks enough respect for their fellow man to pay them more than that.
The removal of the minimum wage would simply be a gift to employers taken from the pockets of actual workers. Businesses don't just pay the minimum wage out of the kindness of their hearts; to pay that wage is code for "I would pay you less if I could."