You don't need to be Fed Chairman Ben Bernanke to figure out the employment numbers in the U.S. are high. So for a company that profits from writing checks for primarily small to midsize companies, it's not the best of times. But Wall Street analysts who cover Paychex (PAYX) don't think it'll always be that way. Consensus estimates peg the firm with 8% earnings growth in 2011 after two years of declines. On a simplified level, it's all about the