Taxes to government and "tithes and offerings" to the Lord are two different things.
In the United States - as in most countries - a citizen pays taxes to the various levels of government for specific items and services. Local government gets money for schools, roads, police and fire protection and probably a couple other things I have omitted. Federal government gets money to "...form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence (sic), promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity" as mentioned in the preamble to the Constitution.
Most levels of government have, over time, surrendered to 'mission creep' and expanded their 'duties'. This means expanding their authority and fiscal demands.
One example of 'mission creep' in this regard is the federal Department of Education. One can argue - and have - such a department is justifiable to "... unsure domestic Tranquility... [and] ...promote the general Welfare..." On the other hand, since every state and every country, and many cities already have educational functions overseeing the funding and operation of schools, this can be argued as not having a valid purpose - especially as the Federal Government has no schools domestically.
Another example is that of monetary handouts to those who refuse to work. "Charity" in the popular sense of assisting indigents and those who are unable to provide for themselves has - in the United States - always been a privately funded operation. Until the Great Depression of the last Century when the Federal Government began to use tax funds to offer "charity". This has - uh - expanded in scope.
Paying taxes is a proper obligation for Christians. However, it is properly Christian to avoid paying taxes one does not legally owe - i. e. take all the deductions one may legally take - and, work to restrict all governments to the minimums dictated by Constitutional and documentary statements and restrictions. Voting for those measures and candidates reflecting those values.
Offerings to God. The Old Testament is full of the concept. All worshippers of the Lord were commanded and expected to present "tithes and offerings".
This concept transferred over to Christianity. Are Christians under "Law" to tithe? No, Christians are not under the Mosaic Law of the Jews. Yes, Christians are under the commandments of Jesus Christ. There are no specific statements which say something to the effect of "You must give money to God by way of God's Congregation"; yet Jesus does speak approvingly of the widow in Luke 21:1-4.
No, nothing speaks of a 'tithe' in the New Testament as in the Old Testament. However, many Christians consider it a good precedent for giving. Compared to many Christians of older times (prior to A. D. 400) seem to have given far more than ten percent; we are actually cheapskates at only ten percent.
There are a couple of mistaken impressions in this thread. One is the statement about 'the tenth sheep'. The wording is correct, but can be taken to mean the idea that God gets the 'rest' of the possessions. This neglects the other commands about the tithes to God being 'the best of the flock' or 'the best of the harvest' and so on. No offering was to be the leavings or left-overs or sickly or lame one of the group.
Aside from that, a 'cheap' program of giving to God's programs reflects a lack of faith in God Himself. Can any Christian truly believe God will take and not give back? I get further on what is left after I give than all of what I had before.
Please do not misunderstand; a Christian is under no obligation to give to frauds and sharpsters masquerading as Christian workers. The Lord has given us all brains and expects us to use them. However, if one is swindled in such manner, the Lord provides and blesses the giver for the obedience; and will see to the swindler. (I'd rather be the swindled.)
Nor is a Christian obligated to contribute to 'church programs' with which one does not accept as 'Godly'. There are many 'good' programs of those who claim to be represented Christ. No doubt many are as advertised. (I'm not talking about shysters here.) But no one can contribute to them all. God directs His own in specific 'interests' for lack of a better word. I give to one or two children's ministries and some student (Christian) organizations. I also give to some missionaries and individual ministries and personal service causes.
However, everyone will have their own preferences in such matters. God will lead.
Interestingly, under the Mosaic Law, God thought everyone should give the same percentage. The 'modern' concept of low income earners are actually hampered by paying the same rate as higher income earners says God is wrong.
It is far more beneficial to the economy and much more Christian to desire 'low income earners' to earn more, by virtue of being more equipped and more productive than merely to protect low income earners and keep them locked into low incomes. Which relate back to God's blessings and self-improvement.
I'll side with God over Karl Marx.