Not necessarily.
Nothing wrong with that. But I don't think the proposed tax cuts by themselves will have much effect on the prosperity of the working class.
If you mean working class prosperity improvement, then the only cost might be large reductions in future working class prosperity when the payment on the deficit is required.
How does this repayment and subsequent austerity work? My understanding is that a fiat currency govt can purchase anything available for sale in its currency, which would include retiring or rolling over its "debt". What was under the gold standard borrowing is now a reserve maintenance operation.
If the bond markets don't want treasuries, not likely in the foreseeable future, the treasury can direct the fed to buy them.
At some point, debt is repaid - either with tax revenue or inflation. If that cost is sufficiently high, then it may not be worth it. For example, if the result is hyperinflation, then it probably was not worth it.
Right now, the treasury can ask the Fed, but it cannot direct it.