If you are in a high-tax state, your employees will pay a lot in taxes, and the cost is passed on to you, their employer. You will need to pay them enough to pay 40% in taxes and have some money left for living expenses.
Which may make your startup (or any business, really) uncompetitive, or even infeasible compared to low-tax countries/states.
There needs to be a cautious balance between providing social support (which I am all for) and overtaxing. For me, the most important part is the amount of tax money that actually goes to benefit the people who need it, rather than the bureaucracy.
In the US, the value we get for our taxes is VERY low.