George Osborne has said: "It's very costly to implement.
They said that it was costly to implement and gave unfair advantage to overseas competitors to which it did not apply.
Some tools of this nature are already available, but they can be complicated to use or costly to implement; commercial services like Gmail and Facebook don't provide them.
While such extreme measures can be implemented in exceptional circumstances, they are complex and costly to implement, and hence unlikely to be standard practice for companies like Facebook.
He said public services needed a strategy to avoid mass redundancies, which are costly to implement once compensation is taken into account.
Many analysts say the critical factor in defeating Proposition 6 was Ronald Reagan, then the former governor, who said it would be costly to implement and infringed "on the basic rights of privacy".
Reducing the amount that can be paid into a pension tax-free each year will protect the treasury's tax take, but will be much more supportive to pensions saving and less costly to implement.
"The boom delayed other policies that were costly to implement: judicial reforms, tax reforms, education reforms, labor market reforms, opening up to foreign trade," said Alejandro Werner, who heads the Western Hemisphere department at the I.M.F.
The only provisions with the potential to affect premiums right now are a handful of consumer protections that are popular with the public, and not especially costly to implement.
Nevertheless, this technique is very costly to implement.
Thus, centralized schemes are costly to implement and susceptible to single-point failures.
