Donald Trump has been making a big promise to the nations service workers at his recent campaign rallies: If they send him back to the White House for another term, hell see to it that restaurant servers and other tipped workers no longer pay taxes on their gratuities.

No more taxes on tips , the former president declared in Detroit on Saturday, reiterating a pledge he first made in Nevada earlier this month.

But there are at least two reasons not to take Trumps pitch all that seriously. For starters, not even Republicans were ready to embrace the tip idea after Trump personally pitched it to them during meetings last week. The proposal would add cost and complexity to GOP tax plans for next year, when Congress will grapple with a host of expiring tax cuts for households and businesses.

I think that has more to do with the Electoral College in Nevada than any other policy thats been vetted, Rep. Richard Neal (Mass.), the top Democrat on the House tax committee, told HuffPost.

The other cause for skepticism: Trumps own record as president.

When he had the chance to help restaurant workers, Trump instead pursued a controversial policy to give employers more control over their workers tips. The proposal was designed to allow restaurants to pool their servers gratuities and redistribute them to non-tipped workers like dishwashers and cooks. But it was written in such a way that it appeared nothing could stop businesses from appropriating the tips for themselves.

Trump officials buried an internal analysis that showed tipped workers could lose billions of dollars a year in wages under the plan. This is going to take all the control of the tips that I make and hand it right over to the owners, an Illinois server fumed to HuffPost at the time. Congressional Democrats felt it was necessary to insert a provision in a spending bill barring employers from pocketing the tips .

But they failed to stop a separate Trump policy change for tipped workers. That rule made it easier for employers to pay tipped workers a sub-minimum wage of as little as $2.13 per hour for non-tipped work, like mopping a restaurants bathroom floors. A Labor Department analysis projected that servers would end up spending more of their time on low-wage duties. President Joe Biden reversed key portions of that rule after he assumed office.

Sharon Block, a labor law professor at Harvard Law School and a former Biden administration official, said there was nothing in Trumps record to suggest a desire to improve the lot of service workers.

She noted in an email that Trump never tried to raise the federal minimum wage while he was president. The standard rate of $7.25 per hour hasnt budged since 2009 due to GOP opposition.