Grace Believers and Tithing like under the Law?

      I hear preachers all the time saying, although we are not under the Law but under Grace, we should still give just as much as they did under the Law.  Did Paul make such a statement in Romans through Philemon?  No, and I thought he was our Apostle that gave the church instructions under Grace?  Paul says, concerning giving in 2 Cor 9:7, "Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver.  There are some grace believers giving "of necessity."  They think it is necessary to still give according to the Law, even without a Pauline verse to back that up.  Under the Law paying tithes was not just to benefit those serving religiously at the temple, but it was also to support the widows, orphans, and needy of Jewish society.  In the next paragraph I am going to make the argument that the average employed grace believer is already giving more than they ever did under the Law. 

     In the United States employees are forced to pay 6.2 % Social Security and 1.45 % Medicare. Their employer is also required to match those percentages as an employee benefit.  In addition to that the average American worker pays 14.5 % tax to the federal government. Also each state in the US has some form of tax to help the needy and local government "concerns" (sales tax, property tax, income tax, etc). Google search says the average American pays a total between 25 and 30 percent in federal and state taxes to support the government and "needs" of society. So when all of this is added together (25-30 percent in federal and state taxes, plus the employers match for Social Security and Medicare), the average working grace believer is paying between 32.65 % to 37.65 % in taxes of which part of that is going to help the widows, orphans, and needy in society. 

     In light of the above, I am not saying to not give to the church, but these pastors that hammer people over "tithing" using the Law, need to understand that the average working American Christian is already being forced to "tithe" to support widows, orphans, needy, as well as a government. Yes, we should still give towards the ministry of the Gospel, but the average working Christian in America is already paying more in the form of taxes than the average Jew ever paid in "tithes" under the Law to support the theocratic government of Israel and the needs of the people.  

     The real problem with a lot of these preachers guilt tripping people into giving more is they are too lazy to "make tents" if their church can't afford to pay them a full time salary.  They had rather continue to tell people a false narrative that "you have to give as much under Grace as they did under the Law" rather than getting a job.  If grace preachers really want to follow Paul, then if a church can't pay you full time, then do what 2 Thes 3:7-9 says:

[7] For yourselves know how ye ought to follow us: for we behaved not ourselves disorderly among you;
[8] Neither did we eat any man's bread for nought; but wrought with labour and travail night and day, that we might not be chargeable to any of you:
[9] Not because we have not power, but to make ourselves an ensample unto you to follow us.

     My advice to any aspiring grace preacher would be to plan on having to do some "tent making" like Paul in order to support your family.  If AI is correct 47 % of denominational evangelical pastors work a second job in addition to preaching.  Since Grace Churches are on average smaller in membership than the average evangelical church I would not be surprised if the number of bivocational Grace preachers is not closer to 75%.