The fall of sumptuary laws
Sumptuary legislation enacted over the centuries to reenforce hierarchy and status distinction had long lain unenforced, and ended in 1604. Aided by the slackening of these laws, the English bought more and more luxury goods.
Imports increased perhaps as much as 50% between 1628 and 1640. The value of imported silk fabrics doubled between 1560 and 1622. In 1559-60, raw and semi-finished silk had made up 1.1% of London's imports; by 1622, it had risen to 7.5%.*
*Statistics are derived from Christopher Clay, Economic Expansion and Social Change in England (Cambridge, 1984) II: 124-5.