A "double standard" means having different rules or expectations for different people or situations. It is when two similar things are treated differently, which can be unfair or hypocritical. Full definition
Taking away the personal exemption wipes out like 80 % of the benefit of doubling the standard deduction. (wolfstreet.com)
The final legislation nearly doubles the standard deduction for individuals and married couples filing jointly and limits the deduction for state and local taxes to $ 10,000. (shealygroup.com)