No, but "hardworking Americans" and "the taxpayers" are examples of terms that are better dog whistle candidates.
Both of those are also too vague and over-used by all sides to be dog whistles.
Liberals/Democrats rarely make reference to taxpayers. The implication is (1) that some people pay tax and some don't (everyone has to pay SS/FICA taxes and even if you get your entire income tax withholding refunded back to you, you essentially gave the government a one-year interest-free loan) and (2) that somehow your worth as a citizen or your right to determine policy is determined by how much tax you pay.
The Left prefers the term "working families" even when the families in question do not actually work.
The Left (as opposed to moderate Democrats) doesn't use the term "taxpayers" because it has no rhetorical value for someone advocating increased spending and wealth redistribution. Unless they are going after spending abuses in the Pentagon, or other spending the Left doesn't like, in which case the term makes sense.
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