Looks like a centralized alternative to a bank card. Rather than using an existing network like Visa or MasterCard as the backbone it appears that their intent is to build their own separate system. The project is still in the planning phase though, so what it eventually looks like (if it ever happens) is anyones guess.
There’s technically two different rates employers are federally required to pay. First there’s the standard $7.25/h. The second is for workers that receive cash tips. Employers are allowed to pay said workers as little as $2.13/h so long as their tips and their regular wages work out to $7.25h. If the employee’s gross pay works out to less than $7.25/h, then the employer is obligated to make up the difference. The idea, I presume, is to allow some wiggle room to “encourage a more competitive market for smaller businesses,” while still ensuring workers make at least the minimum.