A bouquet of spray carnations grown here costs around $3.20 in a British supermarket, while even the best-paid of manual workers earns a daily rate of $2.10, working a 46-hour week. While some workers live in compounds provided by employers, others live in hovels. And while big companies pay twice the government-approved minimum wage, other growers pay the official minimum — just over a dollar a day to cover housing, food and bare bones survival