Roughly half of all goods sold are imported. Right now, imported goods compete with American goods (and other imported goods) in the market place, with the benefit of lower taxes as well as lower labor rates. Under the FairTax, imported goods would have the same effective US tax rate as American goods, PLUS the tax rate in their country of origin. That would make US goods much more competitive. You can if you wish go to FairTax.org and see the math for yourself - though I suspect your objects are rooted not in math, but in envy.
The FairTax framers state that market pressure will cause employers to give employees the matching "contribution"; personally I think it would have to be made law. Far too many people simply aren't worth more than they are now paid, especially given the current very high unemployment. But it doesn't really matter. Congress will never vote away their biggest source of power and fund raising, the ability to punish and reward via the tax code. And even if the Congresscritters had such a mind, the American people will never support a tax scheme that doesn't punish the wealthy, even if convinced they and the country will benefit. The irony of course is that the truly wealthy now pay no higher a percentage (and sometimes less) than do the middle class.