The flaw is that YOU aren’t the only one getting more money, YOU can do that by job hopping and getting promotions or improving your marketability through skills.
The issue starts when everyone gets a blanket pay raise across industries and communities for no reason.
Let’s say you live in an apartment building that charges $1000 month because it’s what most people can afford in the community. Now, let’s say everyone got a pay raise and production isn’t keeping up with everyone’s need for housing. Nothing is stopping that apartment from raising rent to accommodate people who have the money to pay $1400 per month. You now are getting paid more, but your quality of life is about the same with your high cost of living expenses.
A deeper question would be, why is production not keeping up?
Well paying more wage as a blanket, tanks the ability for new small businesses to start because it’s riskier and less incentivized for the owners. Why risk your life savings and work a much much harder job when you can make about the same money working a corporate job with much more financial security?
What you end up indirectly incentivizing is the mega corporation that can afford to pay more to their minimum wage workers (which most of them will know how to leverage the government to subsidize their care..like Walmart does today.) These corporations will also be able to swallow up competition who can no longer pay the increased wage and keep afloat. And, you now have disincentivized small businesses as a much riskier bet than a stable job at said mega corporation.
No worries, best of luck testing the theory of waiting around for people to pay you more.