You mean those "some" who are currently unemployed. Perhaps those "some" who may not have the skill level to obtain a job that pays more. Fact is not everyone is worth $20/hr.

There's a reason politicians do not raise the minimum wage to $20/hr. It's because a raise in the minimum wage is directly correlated to unemployment. Businesses that cannot afford the wage increases simply get by by asking less workers to be more productive and lay off those they cannot afford to pay.

Wages offered to workers are the competitive force between businesses for skilled labor. Have you ever tried hiring a pool of workers when minimum wage is being offered? I'll tell you what,.....put an add in the paper for a min wage job and tell me how many viable candidates you come up with out 10, 20. It costs businesses to train and hire workers so high turnover is not in their best interests. If they want good workers and want to keep them, they'll pay them accordingly.
_________________________
On a long enough timeline the survival rate for everyone drops to zero.